What muscles do you use when you rise up on your toes?

Learn what is synovial fluid and synovial fluid function. Understand the location and composition of synovial fluid, as well as how it is produced and analyzed.

Learn about flexion movement. This involves learning the flexion definition and about muscle flexion movements and common flexion exercises with examples.

Understand a ligament definition in anatomy. Learn about ligament function and structure,, and explore types of ligaments, including extrascapular and intracapsular.

Learn about the pleural membrane, its location and function. Also explore the major organs in the pleural cavity.

Learn about muscle lever systems in the body. Discover the types of levers in the body and which parts of the body act as levers. See examples of anatomical levers.

Acidosis is the presence of excessive acid in the blood. Compare the two kinds of acidosis: metabolic and respiratory acidosis, and discover common acidosis symptoms and existing methods to treat the condition.

Explore isometric contraction and isotonic contraction. Discover the two main types of muscle contractions and find the differences between them with examples.

Explore the upper leg muscles & learn their names, including the major leg muscles of the thigh. Understand how the leg muscle groups work together to help you move.

Intervertebral discs are pads of fibrocartilage located between the 33 vertebrae in humans and serve a set of functions, including protecting the vertebrae and nerves in the spine. Learn more about the functions of intervertebral discs and explore how they are affected by injuries such as herniated discs and degenerative diseases like arthritis.

Learn the definition of the endoderm and understand the function of the endoderm. Learn about germ layer derivatives, including those of the mesoderm and endoderm.

In this lesson, learn what is periosteum. Learn about periosteum functions and its importance in human bone growth. See where can you find the periosteum.

What is a tendon? Learn about tendon structure, tendon function, and tendon injuries. See tendon definition and understand what is the purpose of tendons.

Learn what the orbicularis oris muscle does. Discover the orbicularis oris' function and action, see where it is located, and find its origin and insertion points.

Learn the definition of adduction and understand how it differs from abduction. Discover adduction examples for various body parts and associated exercises.

Sensory nerves include different types of sensors and receptors with various functions. Explore differences in sensation, and learn about exteroceptors and mechanoreceptors, Pacinian and Meissner's corpuscles, Ruffini nerve endings, and Krause's end organs.

Learn about forearm muscle anatomy including arm, wrist, and hand muscles. Learn about the different functions of the muscles and how they contribute to movement.