Introduction to biology

Length: 17 minutes
Description: Learn more: http://www.khanacademy.org/video?v=Gcj ...

Introduction to Evolution and Natural Selection
Length: 1 minute
Description: Learn more: http://www.khanacademy.org/video?v=oFG ...

Ape Clarification
Length: 11 minutes
Description: Learn more: http://www.khanacademy.org/video?v=qxO ...

Intelligent Design and Evolution
Length: 9 minutes
Description: Learn more: http://www.khanacademy.org/video?v=nh1 ...

Evolution Clarification
Length: 13 minutes
Description: Learn more: http://www.khanacademy.org/video?v=dR_ ...

Natural Selection and the Owl Butterfly
Length: 28 minutes
Description: Learn more: http://www.khanacademy.org/video?v=_-v ...

DNA
Length: 19 minutes
Description: Learn more: http://www.khanacademy.org/video?v=DuA ...

Variation in a Species
Length: 18 minutes
Description: Learn more: http://www.khanacademy.org/video?v=s9H ...

Chromosomes, Chromatids, Chromatin, etc.
Length: 18 minutes
Description: Learn more: http://www.khanacademy.org/video?v=kaS ...

Mitosis, Meiosis and Sexual Reproduction
Length: 20 minutes
Description: Learn more: http://www.khanacademy.org/video?v=LLK ...

Phases of Mitosis
Length: 27 minutes
Description: Learn more: http://www.khanacademy.org/video?v=ijL ...

Phases of Meiosis
Length: 19 minutes
Description: Learn more: http://www.khanacademy.org/video?v=-yC ...

Embryonic Stem Cells
Length: 12 minutes
Description: Learn more: http://www.khanacademy.org/video?v=RZh ...

Cancer
Length: 17 minutes
Description: Learn more: http://www.khanacademy.org/video?v=eEU ...

Introduction to Heredity
Length: 25 minutes
Description: Learn more: http://www.khanacademy.org/video?v=D5y ...

Punnett Square Fun
Length: 14 minutes
Description: Learn more: http://www.khanacademy.org/video?v=4Kb ...

Hardy-Weinberg Principle
Length: 14 minutes
Description: Learn more: http://www.khanacademy.org/video?v=-RO ...

Sex-Linked Traits
Length: 18 minutes
Description: Learn more: http://www.khanacademy.org/video?v=TDo ...

Bacteria
Length: 23 minutes
Description: Learn more: http://www.khanacademy.org/video?v=0h5 ...

Viruses
Length: 13 minutes
Description: Learn more: http://www.khanacademy.org/video?v=YQf ...

ATP: Adenosine Triphosphate
Length: 14 minutes
Description: Introduction to cellular respiration, glycolysis, ...

Introduction to Cellular Respiration
Length: 13 minutes
Description: Learn more: http://www.khanacademy.org/video?v=orI ...

Oxidation and Reduction Review From Biological Point-of-View
Length: 17 minutes
Description: Learn more: http://www.khanacademy.org/video?v=_Ky ...

Oxidation and Reduction in Cellular Respiration
Length: 13 minutes
Description: Learn more: http://www.khanacademy.org/video?v=FE2 ...

Glycolysis
Length: 17 minutes
Description: Learn more: http://www.khanacademy.org/video?v=juM ...

Krebs / Citric Acid Cycle
Length: 17 minutes
Description: Learn more: http://www.khanacademy.org/video?v=mfg ...

Electron Transport Chain
Length: 4 minutes
Description: Learn more: http://www.khanacademy.org/video?v=W_Q ...

Oxidative Phosphorylation and Chemiosmosis
Length: 13 minutes
Description: Learn more: http://www.khanacademy.org/video?v=-rs ...

Photosynthesis
Length: 20 minutes
Description: Learn more: http://www.khanacademy.org/video?v=GR2 ...

Photosynthesis: Light Reactions 1
Length: 18 minutes
Description: Learn more: http://www.khanacademy.org/video?v=yfR ...

Photosynthesis: Light Reactions and Photophosphorylation
Length: 13 minutes
Description: Learn more: http://www.khanacademy.org/video?v=slm ...

Photosynthesis: Calvin Cycle
Length: 17 minutes
Description: Learn more: http://www.khanacademy.org/video?v=EQv ...

Photorespiration
Length: 16 minutes
Description: Learn more: http://www.khanacademy.org/video?v=7yn ...

C-4 Photosynthesis
Length: 8 minutes
Description: Learn more: http://www.khanacademy.org/video?v=xp6 ...

CAM Plants
Length: 21 minutes
Description: Learn more: http://www.khanacademy.org/video?v=Hmw ...

Parts of a cell
Length: 18 minutes
Description: Learn more: http://www.khanacademy.org/video?v=aub ...

Diffusion and Osmosis
Length: 20 minutes
Description: Learn more: http://www.khanacademy.org/video?v=SPG ...

The Lungs and Pulmonary System
Length: 16 minutes
Description: Learn more: http://www.khanacademy.org/video?v=fLK ...

Red blood cells
Length: 14 minutes
Description: Learn more: http://www.khanacademy.org/video?v=Qhi ...

Circulatory System and the Heart
Length: 14 minutes
Description: Learn more: http://www.khanacademy.org/video?v=LWt ...

Hemoglobin
Length: 6 minutes
Description: Learn more: http://www.khanacademy.org/video?v=ob5 ...

Anatomy of a Neuron
Length: 13 minutes
Description: Learn more: http://www.khanacademy.org/video?v=C_H ...

Sodium Potassium Pump
Length: 6 minutes
Description: Learn more: http://www.khanacademy.org/video?v=ye3 ...

Correction to Sodium and Potassium Pump Video
Length: 18 minutes
Description: Learn more: http://www.khanacademy.org/video?v=gkQ ...

Electrotonic and Action Potentials
Length: 12 minutes
Description: Learn more: http://www.khanacademy.org/video?v=7wg ...

Saltatory Conduction in Neurons
Length: 15 minutes
Description: Learn more: http://www.khanacademy.org/video?v=Tbq ...

Neuronal Synapses (Chemical)
Length: 9 minutes
Description: Learn more: http://www.khanacademy.org/video?v=zop ...

Myosin and Actin
Length: 9 minutes
Description: Learn more: http://www.khanacademy.org/video?v=LiO ...

Tropomyosin and troponin and their role in regulating muscle contraction
Length: 14 minutes
Description: Learn more: http://www.khanacademy.org/video?v=Sau ...

Role of the Sarcoplasmic Reticulum in Muscle Cells
Length: 16 minutes
Description: Learn more: http://www.khanacademy.org/video?v=uY2 ...

Anatomy of a muscle cell
Length: 16 minutes
Description: Learn more: http://www.khanacademy.org/video?v=O1N ...

Role of Phagocytes in Innate or Nonspecific Immunity
Length: 8 minutes
Description: Learn more: http://www.khanacademy.org/video?v=rp7 ...

Types of immune responses: Innate and Adaptive. Humoral vs. Cell-Mediated
Length: 14 minutes
Description: Learn more: http://www.khanacademy.org/video?v=Z36 ...

B Lymphocytes (B cells)
Length: 11 minutes
Description: Learn more: http://www.khanacademy.org/video?v=j_k ...

Professional Antigen Presenting Cells (APC) and MHC II complexes
Length: 20 minutes
Description: Learn more: http://www.khanacademy.org/video?v=uwM ...

Helper T Cells
Length: 10 minutes
Description: Learn more: http://www.khanacademy.org/video?v=oqI ...

Cytotoxic T Cells
Length: 11 minutes
Description: Learn more: http://www.khanacademy.org/video?v=xaz ...

Review of B cells, CD4+ T cells and CD8+ T cells
Length: 14 minutes
Description: Learn more: http://www.khanacademy.org/video?v=FXS ...

Inflammatory Response
Length: 18 minutes
Description: Learn more: http://www.khanacademy.org/video?v=cc8 ...

The Kidney and Nephron
Length: 14 minutes
Description: Learn more: http://www.khanacademy.org/video?v=czY ...

Secondary Active Transport in the Nephron
Length: 8 minutes
Description: Learn more: http://www.khanacademy.org/video?v=Tmt ...

Species
Length: 12 minutes
Description: Learn more: http://www.khanacademy.org/video?v=oHv ...

Taxonomy and the Tree of Life