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Funktionen von Zellen, Morphologie & Zytoskelett | 34:17 |
Erbinformationen, Proteinbiosynthese & Proteolyse | 27:46 |
Mitochondrien, Zellorganellen und ihre Funktionen | 17:39 |
Zellmembranen und Membranproteine: Eigenschaften und Klassifizierung | 38:45 |
Zytoskelett | 45:04 |
Zell-Zell-Kontakte und Zell-Matrix-Kontakte | 24:31 |
Arten der Exozytose und Endozytose | 26:38 |
Zytosol, Peroxisome und Porphyrin | 18:13 |
Morphologie: Endoplasmatisches Retikulum, Golgi-Apparat und Ribosomen | 21:31 |
Passive Transport – Transport Across Cell Membranes | 07:02 |
Osmosis and Tonicity – Transport Across Cell Membranes | 07:32 |
Active Transport – Transport Across Cell Membranes | 07:56 |
Modes of Cell Communication: Introduction | 03:07 |
Modes of Cell Communication: Overview | 05:35 |
Phosphorylation – Modes of Cell Communication | 03:20 |
Intracellular Receptors – Modes of Cell Communication | 04:57 |
Second Messenger Systems: Overview | 01:59 |
Second Messenger Systems: Definition | 03:35 |
Receptor Tyrosine Kinase Pathways – Second Messenger Systems | 12:42 |
G-protein Coupled Receptors – Second Messenger Systems | 07:50 |
Recap – Second Messenger Systems | 02:59 |
Quiz zum Kurs „Cell Communication (EN | OmU)“ |
Cell Cycle and Cell Division Control: Introduction | 02:43 |
Cell Cycle Controls | 09:12 |
Growth Factors | 02:45 |
P53 Gene | 02:55 |
Mutated Genes | 05:10 |
Two Hit Hypothesis | 02:41 |
Mitosis: Overview | 01:26 |
Language of Chromosomes – Mitosis | 02:59 |
Eukaryotic Chromosomes – Mitosis | 02:53 |
Cell Division – Mitosis | 01:39 |
Interphase and Prophase – Mitosis | 02:23 |
Prometaphase, Metaphase and Anaphase – Mitosis | 03:43 |
Telophase and Cytokinesis – Mitosis | 04:33 |
Introduction and Reduce of Chromosomes – Meiosis | 06:23 |
Homologous Chromosome Pairs – Meiosis | 03:02 |
Meiosis I: Prophase I | 02:05 |
Meiosis I: Metaphase I | 04:06 |
Meiosis I: Anaphase I and Telophase I | 01:49 |
Meiosis II: Phases | 03:49 |
Human Karyotype – Meiosis | 01:26 |
Meiosis in Humans | 03:25 |
Comparing Mitosis and Meiosis – Cell Division | 03:34 |
Quiz zum Kurs „Cell Cycle (EN | OmU)“ |
DNA and RNA | 01:59 |
Coding and Noncoding DNA Sequences | 04:13 |
Transposable Elements | 05:29 |
Single Nucleotide Polymorphisms | 03:38 |
BRCA2 Gene | 03:48 |
Expressed Sequence Tags | 03:20 |
Using Microarrays to Detect Cancers – Genomics | 04:34 |
Structure of DNA and RNA – DNA Structure and Replication | 03:55 |
Prokaryotic Replication – DNA Structure and Replication | 05:29 |
The Enzymes of Replication – DNA Structure and Replication | 02:54 |
Closer Look at Replisome – DNA Structure and Replication | 05:07 |
Eukaryotic Replication – DNA Structure and Replication | 04:51 |
Proofread and Repair Mechanisms | 04:45 |
Binding Motifs | 06:51 |
Comparing Prokaryotic and Eukaryotic mRNA | 01:24 |
Prokaryotic Gene Expression | 03:16 |
Inducible Operons | 05:06 |
Repressible Operons | 02:48 |
Other Levels of Prokaryotic Gene Regulation | 01:55 |
The Levels of Eukaryotic Gene Expression | 03:56 |
Transcriptional Control | 05:12 |
Impact of Chromatin on Transcription | 04:52 |
RNA Interference, AlterRNAtive Splicing and RNA Editing | 04:28 |
Other Levels of Eukaryotic Gene Regulation | 03:54 |
Transcription: Introduction | 04:29 |
Elongation of mRNA | 02:47 |
Prokaryotic Transcription | 01:21 |
Eukaryotic Transcription | 03:33 |
Post-transcriptional Modifications | 01:54 |
Post-transcriptional Modification: Splicing | 05:28 |
Ribosome | 01:46 |
Initiation of Translation | 01:50 |
Elongation of Translation | 06:46 |
Termination of Translation | 04:02 |
Gene Expression – Translation and Summary | 03:26 |
One Gene One Polypeptide Hypothesis | 04:15 |
Overview of Transcription and Translation | 02:12 |
Prokaryotes vs. Eukaryotes | 01:37 |
Types of RNA | 02:18 |
How to Translate the Genetic Code | 05:28 |
Quiz zum Kurs „Molecular Genetics (EN | OmU)“ |
Comparative Genome Analysis | 04:24 |
Recombinant DNA | 02:16 |
Cutting the DNA | 02:58 |
Gel Electrophoresis | 04:47 |
Bacterial Transformation | 01:45 |
Molecular Cloning | 05:09 |
Host-vector Systems | 02:11 |
Transforming Eukaryotic Cells | 02:37 |
CRISPR-Cas9 System | 04:26 |
Polymerase Chain Reaction | 04:49 |
DNA Libraries | 04:44 |
Probes and Blotting Methods | 05:26 |
DNA Fingerprinting | 03:53 |
Short Tandem Repeats | 05:36 |
Biotechnology in Medicine | 06:16 |
Biotechnology in Agriculture | 04:49 |
Transgenic Animals | 01:35 |
Restriction Mapping | 03:49 |
Cytological Maps | 03:14 |
Sequence Tagged Sites | 04:46 |
Sanger Sequencing | 07:31 |
Sequencing Larger Genomes | 05:06 |
Quiz zum Kurs „Gene Technology (EN | OmU)“ |
Mutations in General | 03:19 |
Single Nucleotide Mutations | 01:43 |
Frameshift Mutations | 03:03 |
Chromosomal Mutations | 02:41 |
Classical Genetic Assumptions – Classic Mendelian Genetics | 02:42 |
Mendel's Investigations of the Pea Plant – Classic Mendelian Genetics | 04:34 |
Monohybrid Crosses – Classic Mendelian Genetics | 04:20 |
Mendel's Principles and Meiosis – Classic Mendelian Genetics | 03:49 |
Human Pedigrees – Classic Mendelian Genetics | 03:39 |
Dihybrid Crosses – Classic Mendelian Genetics | 04:58 |
Principle of Independent Assortment – Classic Mendelian Genetics | 02:15 |
Linking Mendel and Chromosomes – Chromosome Theory and Sex Linkage | 03:43 |
Sex Chromosomes – Chromosome Theory and Sex Linkage | 01:11 |
Sex Linked Genetic Disorders – Chromosome Theory and Sex Linkage | 06:49 |
Chromosome Theory: Exceptions – Chromosome Theory and Sex Linkage | 03:14 |
Epigenetic Factors – Chromosome Theory and Sex Linkage | 04:29 |
Recombination of Chromosomes – Gene Mapping | 04:29 |
Percent Recombination – Gene Mapping | 01:18 |
How to Create a Genetic Map – Gene Mapping | 04:11 |
How to Avoid Missed Double Crossovers – Gene Mapping | 02:28 |
Usage of Physical Maps – Gene Mapping | 01:53 |
Rules of Addition and Multiplication – Beyond Gregor Mendel | 04:08 |
Predicting the Outcome of a Cross – Beyond Gregor Mendel | 05:20 |
Test Cross: Uncover Genotypes – Beyond Gregor Mendel | 02:15 |
Polygenic and Pleiotropic Inheritance – Beyond Gregor Mendel | 06:01 |
Multiple Alleles and Incomplete Dominance – Beyond Gregor Mendel | 04:28 |
Phenotypes Affected by Environment and Epistasis – Beyond Gregor Mendel | 05:46 |
Quiz zum Kurs „Formal Genetics (EN | OmU)“ |
Autosomal Recessive Inheritance | 08:49 |
Autosomal Recessive Disorders | 04:04 |
Autosomal Dominant Inheritance | 09:01 |
Autosomal Dominant Disorders | 04:15 |
X-linked Inheritance | 07:15 |
X-linked Recessive Inheritance | 05:43 |
X-linked Recessive Disorders | 04:03 |
X-linked Dominant Inheritance | 05:07 |
X-linked Dominant Disorders | 05:38 |
Mitochondrial DNA Inheritance | 04:21 |
Multifactorial Inheritance: Introduction | 03:29 |
Population Genetics: Introduction | 05:15 |
Allelic Frequencies | 05:33 |
Hardy-Weinberg Principle | 04:40 |
Hardy-Weinberg Assumptions | 04:39 |
Quiz zum Kurs „Medical Genetics: Basics (EN | OmU)“ |
Bacteria and Bacterial Structure – Bacteria | 06:11 |
Gram-positive Solution – Bacteria | 03:43 |
Gram-negative Solution – Bacteria | 06:14 |
Bacterial Interior – Bacteria | 03:49 |
Making a Bacterial Cell – Bacteria | 04:37 |
Fueling in Heterotrophs – Bacteria | 04:13 |
Harnessing Bacteria – Bacteria | 03:24 |
Bacteria Exchange DNA – Bacteria | 02:49 |
Eukaryotic Microbes – Fungi | 05:36 |
Yeasts – Fungi | 04:13 |
Pathogenic Yeasts – Fungi | 06:16 |
Filamentous Fungi (Molds) – Fungi | 03:11 |
Indoor Molds – Fungi | 03:11 |
Histoplasmosis – Fungi | 04:13 |
Global Warming and Fungal Diseases – Fungi | 03:32 |
Virus Overview – Viruses | 05:15 |
How 'infected' are we? – Viruses | 05:02 |
Good Viruses – Viruses | 04:05 |
Are Viruses Alive? – Viruses | 01:55 |
Viruses are Very Small – Viruses | 04:04 |
Viruses are not as Small as we Once Thought! – Viruses | 03:01 |
How old are Viruses? – Viruses | 02:15 |
Virus Discovery – Viruses | 04:21 |
We Continue to Discover new Viruses – Viruses | 05:30 |
Introduction to Parasites | 02:35 |
Protozoa – Parasites | 03:58 |
Classification of Protozoan Parasites – Parasites | 02:46 |
Helminths (Worms) – Parasites | 05:40 |
Nematodes (Roundworms) and Cestodes (Flatworms) - Parasites | 02:57 |
Schistosomes – Parasites | 04:22 |
Estimated Worldwide Prevalence of Parasitic Infections – Parasites | 01:40 |
Introduction – Prions | 04:13 |
Scrapie – Prions | 03:03 |
Inactivation of Scrapie Infectivity – Prions | 03:14 |
Current View of Prions – Prions | 04:15 |
Sporadic CJD – Prions | 02:58 |
Forced Cannibalism Spreads BSE – Prions | 03:10 |
Chronic Wasting Disease – Prions | 02:58 |
Important Concepts and Terms — Introduction to Microbiology | 04:22 |
Fungi — Introduction to Microbiology | 03:01 |
Protozoa – Introduction to Microbiology | 04:52 |
The Concept of Microorganisms – Introduction to Microbiology | 03:43 |
Surviving the Extremes of Life – Introduction to Microbiology | 01:50 |
Metabolic Wizardry – Introduction to Microbiology | 03:52 |
Why do we Care About Microbes? – Introduction to Microbiology | 03:17 |
Quiz zum Kurs „Microbiology: Introduction (EN | OmU)“ |
Human Microbiome | 06:00 |
Infection Basics | 03:20 |
Bacteria Spread | 03:55 |
Antimicrobial Compounds | 02:14 |
Antimicrobial Resistance | 07:07 |
Quiz zum Kurs „Bacteria (EN | OmU)“ |
Methods and Common Calculations: Introduction | 04:23 |
Introduction to Physics | 03:14 |
Tools & Skills for Quantitative Thinking and Scientific Notation | 04:09 |
Scientific Notation Example and Unit Analysis | 05:46 |
Proportionality | 02:59 |
Calculus: Introduction | 03:44 |
Gradients of Straight and Curved Lines | 05:25 |
First Principles – Calculus Methods | 07:14 |
General Power Rule – Calculus Methods | 01:52 |
Differentiation Basics | 02:25 |
Derivative of eˣ and ln(x) | 05:31 |
Logarithm Rules | 01:58 |
Integration Method | 07:28 |
Integration Method: Example 1 | 04:53 |
Integral Examples 1 | 05:36 |
Gradients and First Principles: Exercise 2 | 05:47 |
Differentiation: Exercise 1 – Calculus Methods | 02:05 |
Differentiation: Exercise 2 – Calculus Methods | 03:14 |
Differentiation of Exponentials and Logs: Exercise 1 | 01:36 |
Basic Integration: Exercise 1 | 01:55 |
Quiz zum Kurs „Mathematics: Methods and Common Calculations (EN | OmU)“ |
Description of Motion: Describing Motion with an Apple | 05:09 |
Intervals of Time | 06:07 |
Descriptions of Motion: Example | 03:03 |
Equations of Motion in 1 Dimension | 05:02 |
Equations of Motion: Example | 05:45 |
Graphs of Motion | 03:34 |
Visualizing Kinematics | 10:21 |
Vectors | 05:16 |
Quiz zum Kurs „Translational Motion (EN | OmU)“ |
Force and Newton's Laws | 06:55 |
Newton‘s 2nd Law: Example, 1 Dimension | 07:51 |
Newton‘s 2nd Law: Example, 2 Dimensions Part 1 | 07:14 |
Newton‘s 2nd Law: Example, 2 Dimensions Part 2 | 03:57 |
Newton‘s 3rd Law: Example | 05:26 |
Important Forces: Gravity | 05:09 |
Important Forces: Normal Force | 06:19 |
Inclined Plane: Example | 06:44 |
Important Forces: Tension | 01:47 |
Tension: Example | 11:26 |
Important Forces: Friction | 05:37 |
Friction: Example | 08:51 |
Important Forces: Air Resistance | 04:11 |
Uniform Circular Motion | 04:41 |
Uniform Circular Motion Example | 08:06 |
Center of Mass | 03:05 |
Quiz zum Kurs „Force (EN | OmU)“ |
Torque and Equilibrium | 06:30 |
No Net Force at the Equilibrium | 07:08 |
Torque Example | 07:55 |
Quiz zum Kurs „Equilibrium (EN | OmU)“ |
Kinetic Energy | 06:22 |
Kinetic Energy Example | 03:51 |
Gravitational Potential Energy | 04:32 |
Gravitational Potential Energy Example | 09:53 |
Spring Potential Energy | 02:33 |
Energy: Important Facts | 04:08 |
Quiz zum Kurs „Energy of Point Object Systems (EN | OmU)“ |
Introduction to Work | 04:22 |
Work: As Change in Energy | 05:59 |
Work: Example 1 | 06:25 |
Work: Example 2 | 09:15 |
Work, Force and Distance | 03:21 |
Power | 03:30 |
Power: Equations and Example | 04:48 |
Power: Example | 07:12 |
Conservative Forces | 04:19 |
Nonconservative Forces | 02:56 |
Mechanical Advantage | 08:01 |
Efficiency | 05:18 |
Quiz zum Kurs „Work (EN | OmU)“ |
Momentum: Definition | 03:56 |
Momentum: Derived Quantities | 03:21 |
Momentum: Example | 06:43 |
Collisions | 03:24 |
Quiz zum Kurs „Momentum (EN | OmU)“ |
Hydrostatics | 05:30 |
Density: Example | 07:34 |
Pressure | 05:05 |
Pressure: Example | 04:19 |
Archimedes' Principle | 04:34 |
Buoyancy: Example | 08:13 |
Pascal's Law | 06:20 |
Pascal's Law: Diving | 04:14 |
Ideal Hydrodynamics | 04:18 |
Continuity (Fluids) | 02:43 |
Flow Rate: Example | 07:16 |
Bernoulli's Principle: Example | 02:35 |
Bernoulli's Equation: Example | 05:20 |
Venturi Effect | 02:59 |
Venturi Effect: Example | 05:37 |
Applied Hydrodynamics: Circuit Law of Fluids | 04:12 |
Poiseuille's Law | 06:34 |
Uses of Fluid Laws | 10:19 |
Quiz zum Kurs „Fluids (EN | OmU)“ |
Gases: Basic Theory | 04:54 |
Measurements of Volume, Temperature and Numbers | 05:38 |
Measurement of Gases | 05:08 |
Kinetic Theory of Gases | 02:38 |
Boyle's, Charles', Avogadro's Law | 03:57 |
Ideal Gas Law | 05:03 |
Ideal Gas Law: Example | 04:58 |
Gases: Properties | 04:34 |
Heat Capacity | 05:40 |
Heat Capacity: Example | 06:36 |
Partial Pressure | 08:12 |
Quiz zum Kurs „Gases (EN | OmU)“ |
Electric Charge | 06:15 |
Coulomb's Law | 03:48 |
Coulomb's Law: Example | 13:22 |
Conductors and Insulators | 04:08 |
Electric Fields | 06:10 |
Electric Potential and Voltage | 03:22 |
Electric Potential Energy | 10:56 |
Quiz zum Kurs „Electrostatics (EN | OmU)“ |
Electricity, Circuits and Magnetism | 05:12 |
Ohm's Law | 02:08 |
Resistors | 08:45 |
Ohm's Law and Resistors: Example | 05:07 |
Parallel Plate Capacitors | 07:39 |
Capacitor Energy and Voltage | 03:41 |
Dielectrics | 05:10 |
Capacitance Example | 05:25 |
Circuit Properties and Measurement | 07:28 |
Kirchhoff's Law | 05:48 |
Kirchhoff's Law: Example | 04:46 |
Conductivity | 04:05 |
Basic AC Circuits | 03:08 |
Quiz zum Kurs „Circuit Elements (EN | OmU)“ |
Magnetic Fields | 07:29 |
Magnetic Fields Example | 05:26 |
Lorentz Force | 08:12 |
Magnetic Force Example | 03:54 |
Quiz zum Kurs „Magnetism (EN | OmU)“ |
Waves | 04:30 |
Wave Properties | 09:22 |
Wave Velocity | 03:03 |
Periodic Motion Example | 03:44 |
Springs and Pendulums | 08:28 |
Pendulums | 05:46 |
Quiz zum Kurs „Periodic Motion (EN | OmU)“ |
Basics of Sound | 06:25 |
Decibels | 07:40 |
Sound Dynamics | 03:50 |
Standing Waves | 12:10 |
Waves in a Pipe | 03:53 |
Standing Waves Example | 04:57 |
The Doppler Effect | 07:24 |
Quiz zum Kurs „Sound (EN | OmU)“ |
Electromagnetic Spectrum | 03:08 |
Higher and Lower Frequencies | 03:58 |
Quiz zum Kurs „Light: Electromagnetic Radiation (Oscillations) (EN | OmU)“ |
Interference | 05:53 |
Diffraction | 05:35 |
Properties of Light | 02:21 |
Polarization | 06:28 |
Photons | 05:57 |
Quiz zum Kurs „Light: Electromagnetic Radiation (Optics) (EN | OmU)“ |
Reflection and Refraction | 04:16 |
Snell's Law, Total Internal Reflection, and Dispersion | 06:03 |
Mirrors and Lenses | 07:48 |
Convex Mirrors, Mirror Properties, and Concave Mirrors | 07:49 |
Lenses | 06:58 |
Optical Instruments | 04:43 |
Microscopes, Telescopes and Visual Angle | 04:00 |
The Human Eye | 03:51 |
Quiz zum Kurs „Geometrical Optics (EN | OmU)“ |
Nuclear Properties | 05:37 |
Binding Energy | 09:33 |
Quiz zum Kurs „Structure of Matter: Atomic Nucleus (EN | OmU)“ |
Bohr Model and Atomic Structure | 06:30 |
Electron Energy Levels | 07:18 |
Emission and Absorption Spectrum | 04:49 |
Atomic Quantum Numbers | 07:02 |
Electron Structure Notation | 06:56 |
Electron Configuration in the Periodic Table | 08:40 |
Electron Configuration and Magnetism | 03:38 |
Effective Nuclear Charge | 09:20 |
The Photoelectric Effect | 08:01 |
Quiz zum Kurs „Electronic Structure (EN | OmU)“ |
Radioactivity | 06:24 |
Half-Life and Mass Spectrometry | 09:58 |
Quiz zum Kurs „Atomic Nucleus (EN | OmU)“ |
Strahlenschutzgrundlagen: Dosisbegriffe | 05:22 |
Natürliche und künstliche Strahlenbelastung | 06:28 |
Grundprinzipien des Strahlenschutzes | 14:22 |
Quiz zum Kurs „Strahlenschutzgrundlagen“ |
Basics of Radiology and Computed Tomography (CT) | 09:28 |
Quiz zum Kurs „Use of Radiation in Imaging (EN | OmU)“ |
0th and 1st Law: Temperature and Energy | 04:02 |
2nd Law: Entropy | 05:17 |
Heat | 02:41 |
Heat Capacity and Heat Transfer | 04:24 |
Pressure-Volume Diagrams | 08:51 |
Pressure-Volume Diagrams: Cycle | 08:30 |
Reactions and Enthalpy | 08:52 |
Standard Enthalpy of Formation | 04:06 |
Hess's Law | 03:55 |
Gibbs Free Energy | 05:44 |
Coefficient of Thermal Expansion | 03:20 |
Heat of Phase Changes | 06:14 |
Phase Diagrams | 03:55 |
Quiz zum Kurs „Thermodynamics and Thermochemistry (EN | OmU)“ |
Atome und Elemente (Teil 1) | 33:34 |
Atome und Elemente (Teil 2) | 47:56 |
Chemische Bindungen: Metallische und ionische Bindungen | 29:39 |
Chemische Bindungen: Koordinative und kovalente Bindungen | 21:52 |
Chemische Bindungen: Dipole, Intermolekulare Wechselbeziehungen, Anomalien des Wassers | 30:18 |
Heterogene Gleichgewichte: Heterogene Systeme, Aggregatzustände, Phasenumwandlung | 35:58 |
Heterogene Gleichgewichte: Beispiel für homogene und heterogene Systeme | 18:24 |
Heterogene Gleichgewichte: Gesetzmäßigkeiten von heterogenen Systemen & Trennprinzipien | 38:53 |
Quiz zum Kurs „Einführung in die Chemie“ |
Säuren und Basen 1: Definition, Säure-Base-Paare und Ampholyte | 16:16 |
Säuren und Basen 2: Messung und Berechnung des pH | 28:30 |
Säuren und Basen 3: Titration, Neutralisation und Puffersysteme | 31:33 |
Salze: Dissoziation und Hydratation, Löslichkeitsprodukte und Elektrolyse | 34:47 |
Oxidation und Reduktion 1: Definition, Oxidationszahlen und Redoxreaktionen | 37:58 |
Oxidation und Reduktion 2: Spannungsreihe, Galvanische Zellen und Elektromotorische Kraft (EMK) | 33:48 |
Metallkomplexe: Aufbau, Reaktionen, Eigenschaften und Bedeutung | 34:36 |
Quiz zum Kurs „Anorganik“ |
Chemische Gleichungen: Definitionen (Teil 1) | 11:38 |
Chemische Gleichungen: Definitionen (Teil 2) | 07:16 |
Thermodynamik: Systeme, Reaktionsenthalpie und Entropie | 14:16 |
Thermodynamik: Wiederholung und Gibbs Energie (S) | 12:46 |
Thermodynamik: Chemische Gleichgewichte und Massenwirkungsgesetz | 10:45 |
Thermodynamik: Prinzip des kleinsten Zwangs und Gekoppelte Reaktionen | 11:34 |
Thermodynamik: Gleichgewichte in der Thermodynamik | 11:06 |
Kinetik: Kollisionstheorie, Reaktionsgeschwindigkeit und Reaktionsordnung | 19:34 |
Kinetik: Elementarreaktionen und Energieprofil | 12:28 |
Organische Chemie: Einleitung/Alkane | 32:43 |
Reaktionen der Alkane | 07:18 |
Alkene und Alkine | 19:19 |
Die Aromaten | 17:23 |
Funktionelle Gruppen | 22:11 |
Funktionelle Gruppen als Reste | 21:08 |
Halbacetal-/Acetal-Bildung | 18:08 |
Nachweise in der Organik | 06:34 |
Die Stereochemie | 33:18 |
Zucker/Kohlenhydrate | 10:47 |
Die Fruktose | 05:25 |
Die Polysaccharide | 03:17 |
Aminosäuren: Proteine | 07:39 |
Die Helixstruktur | 12:21 |
Fette und Öle | 12:44 |
Quiz zum Kurs „Vorphysikum Zahnmedizin“ |