Khan Academy: 2757 producten

Hank introduces us to nonvascular plants - liverworts, hornworts & mosses - which have bizarre features, kooky habits, and strange sex live…

See how Atherosclerosis (Fat in the blood vessel wall) hardens the arterial wall and makes it harder for blood to flow through. Rishi is a …

Wegener’s granulomatosis (also known as granulomatosis with polyangiitis) is a type of vasculitis that affects small and medium blood vesse…

Oxidation and reduction in cellular respiration. Reconciling the biology and chemistry definitions of oxidation and reduction. Biology Life…

Properties of metals and how we can explain their properties using electron "sea" model. Chemistry Did you know that everything is made out…

In sp hybridization, the 2s orbital and a 2p orbital hybridize to form two sp orbitals, each consisting of 50% s character and 50% p charac…

Describing and quantifying the benefits that healthy ecosystems provide to humans. Video by California Academy of Sciences. Biology Life is…

How increased s character in a hybrid orbital stabilizes the conjugate base Organic chemistry Sal and Jay cover topics covered in college o…

How K-Ar dating can be used to date very old volcanic rock and the things that might be buried in between Biology Life is beautiful! From a…

Watch how blood gets diverted away from alveoli with low oxygen levels. Rishi is a pediatric infectious disease physician and works at Khan…

Arrhenius definition of acids and bases. Chemistry Did you know that everything is made out of chemicals? Chemistry is the study of matter:…

Understanding how a triglyceride (triacylglycerol) can be formed from a glycerol molecule and three fatty acids. Biology Life is beautiful!…

Pulmonary abscesses occur when part of the lung tissue dies (caused by damage or infection) and gets trapped in a layer of hard tissue in t…

Overview of how the nephrons in the kidney filter blood and reabsorb water and other molecules. Biology Life is beautiful! From atoms to ce…

Introduces aufbau principle, Pauli exclusion principle, and orbital notation. Writes out the quantum numbers for the electrons in H and He.…