Khan Academy: Heart Muscle Contraction: Three Types of Muscle

Rock out with the second installment of a five-part series on earth materials and processes. Your budding geologists make observations of given rock samples and posit classification systems for rocks. They then learn about the...

A compact notebook of slides, this presentation describes characteristics of three types of muscle. Most of the slides consist simply of bullet-point facts for each type, although a diagram and information on the structure of skeletal...

No more beating the pavement to find a virtual model of the human heart. See one in continual real-time motion, and layer it to highlight electrical impulses, blood flow, and valve activity. 

An all-encompassing, fully interactive, gorgeously animated model of the heart can be used to teach cardiac anatomy, physiology, and even a touch of epidemiology.

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]

Check out how the amount of Myosin that is tugging on your heart can change depending on your activity level. Rishi is a pediatric infectious disease physician and works at Khan Academy. [12:02]

Get a close-up view of the cardiac cells and see what makes them different from the other cells in this video lecture. Understand the parts of the heart cells that make it unique and able to carry out contractions. [14:00]

Take a closer look at the heart, explore some of its interesting features and get to know the three layers that make up the heart. Rishi is a pediatric infectious disease physician and works at Khan Academy.

Learn how blood flows through the heart, and understand the difference between systemic and pulmonary blood flow. Rishi is a pediatric infectious disease physician and works at Khan Academy.

If pupils think the three types of rock are classic, punk, and hard, these puzzles offer gentle correction. Scholars match the type of rock to how it formed and an example in four grid puzzles. Each requires problem-solving and...