Khan Academy
Khan Academy: Depolarization Waves Flowing Through the Heart
Get a clearer idea of what a "Depolarization Wave" means and how it goes from cell to cell through the entire heart! Rishi is a pediatric infectious disease physician and works at Khan Academy. [11:44]
Khan Academy
Khan Academy: Preload and Afterload: Preload Stretches Out the Heart Cells
Find out why stretching a heart cell in diastole affects how forcefully it contracts in systole. Rishi is a pediatric infectious disease physician and works at Khan Academy. [12:41]
Khan Academy
Khan Academy: Fetal Circulation: Hypoxic Pulmonary Vasoconstriction
Watch how blood gets diverted away from alveoli with low oxygen levels. Rishi is a pediatric infectious disease physician and works at Khan Academy. [9:13]
Khan Academy
Khan Academy: Fetal Circulation: Double Bohr Effect
Learn how there are two distinct Bohr effects happening at the same time in the placenta. Rishi is a pediatric infectious disease physician and works at Khan Academy. [10:34]
Khan Academy
Khan Academy: Fetal Circulation: Fetal Hemoglobin and Hematocrit
Although mom controls the oxygen source, the fetus has a couple of clever tricks to get the most oxygen possible! Rishi is a pediatric infectious disease physician and works at Khan Academy. [14:32]
Khan Academy
Khan Academy: Pressure Volume Loops: Left Ventricular Pressure vs. Time
Ever wonder exactly how the left ventricle's pressure changes over time? Find out in this color-coded video! Rishi is a pediatric infectious disease physician and works at Khan Academy. [10:51]
Khan Academy
Khan Academy: Tuberculosis: Pulmonary Tb
Learn the effects that TB has on the lungs and some important clinical clues. [12:18]
Khan Academy
Khan Academy: Growth and Metabolism: Digesting Food
Get an overview of three of the key macromolecules of life (proteins, fats, and carbohydrates), and how they get digested and absorbed.
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Khan Academy: Lab Values and Concentrations: Tonicity: Comparing Two Solutions
Find out how tonicity is determined by ions that don't move across membranes and how it affects the movement of water. Rishi is a pediatric infectious disease physician and works at Khan Academy. [11:02]
Khan Academy
Khan Academy: Heart Muscle Contraction: Calcium Puts Myosin to Work
See exactly how calcium binds troponin-C and allows myosin to do some work. Rishi is a pediatric infectious disease physician and works at Khan Academy. [10:03]
Khan Academy
Khan Academy: Flu Symptoms: What Is the Flu?
Learn the difference between the cold and the flu, and how we sometimes can get fooled by viruses. Rishi is a pediatric infectious disease physician and works at Khan Academy. [12:46]
Khan Academy
Khan Academy: Tuberculosis: What Is Tb?
Find out the basics of TB, where it comes from and where it goes. Rishi is a pediatric infectious disease physician and works at Khan Academy. [12:27]
Khan Academy
Khan Academy: Fetal Circulation: Umbilical Vessels and the Ductus Venosus
Watch as fetal blood goes through umbilical vessels and takes a shortcut through the Ductus Venosus to make it back to the heart. Rishi is a pediatric infectious disease physician and works at Khan Academy. [12:43]
Khan Academy
Khan Academy: Endocrinology and Diabetes: Precocious Puberty
At Stanford Medical School with Morgan Theis talking to Dr. Laura Bachrach about precocious puberty. [10:28]
Khan Academy
Khan Academy: Algebra: Conic Sections: Intro to Circles
A video lesson introducing the standard form for the equation of a circle. Starts out with a circle centered at the origin and then discusses the changes to both the equation and the graph when a circle is centered elsewhere. Illustrates...
Khan Academy
Khan Academy: Algebra: Parallel Line Equation
This video demonstrates how to find the equation of a line when given a point on the line and the equation of a line parallel to that line. The equation given is not in slope-intercept form. [4:24]
Khan Academy
Khan Academy: Algebra: Percent Problems
This video works through examples on how to convert a fraction to a percent and a percent to a fraction. Then, it applies this knowledge by demonstrating how to solve algebraic percent problems. Practice problems available. This video is...
Khan Academy
Khan Academy: Algebra: Word Problem Solving 3
A video that demonstrates how to write and solve equations for several different types of algebraic word problems. This is another percent example. This video is also found in the strand Algebra: ck12.org. [11:06]
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Khan Academy: Geometry: Proof Sum of Measures of Angles in a Triangle Are 180
Proof that the sum of the angles in a triangle is 180 using the relationship of angles formed when parallel lines are cut by a transversal. This video also appears in the Geometry: Triangles strand. [6:31]
Khan Academy
Khan Academy: Biology: Mitosis, Meiosis and Sexual Reproduction
An overview of sexual reproduction and how mitosis and meiosis occur to form a particular species. [18:23]
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Khan Academy: Trigonometry: Graph of the Sine Function
Video showing how to derive the graph of the sine function from the unit circle. Includes link to additional practice problems. [7:44]
Khan Academy
Khan Academy: Geometry: Area and Perimeter
Explains how to calculate the area of rectangles, squares, and triangles, in addition to the perimeter of rectangles and squares. Practice problems available. [12:20]
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Khan Academy: Linear Algebra: Vector Dot Product and Vector Length
Video first reviews vector addition and multiplying by a scalar multiple. Gives notation for dot product and shows example of calculating the dot product of vectors. Then gives the formula for vector length and gives examples of using...
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Khan Academy: Linear Algebra: Vector Triangle Inequality
Video first reviews the Cauchy-Schwarz inequality. Then shows a proof of the triangle inequality for vectors and relates it to the triangle inequality from 2-dimensional geometry. [18:53]