BaileyBio.com: Anatomy & Physiology » 05. Powerpoint - Muscular System » muscle_contraction_-_physiology.jpg

Muscle contraction and relaxation: Excitation, excitation-contraction coupling, contraction, relaxation.

MUSCLE TISSUE: Muscle tissue is important for movement and is highly vascular to meet its energy demands. They are highly excitable cells specialized for contraction. There are three types of muscle tissue: skeletal, smooth and, cardiac. Refer to individual pictures for detailed descriptions.

Muscle tissue - A tissue composed of cells or fibers, the contraction of which produces movement in the body.

Diagram of muscle tissue.  I love this.  No wonder we are so strong!  Look at all those fibers packed in there!  I remember learning this in Anatomy and Physiology and nerding out :-)

Diagram of muscle tissue. I love this. No wonder we are so strong! Look at all those fibers packed in there! I remember learning this in Anatomy and Physiology and nerding out :-)

Muscle contraction and relaxation. Interdigitation of thick and thin filaments allows sarcomere contraction, which is best explained by the sliding filament model in which actin filaments slide along myosin filaments. During contraction, both sets of filaments retain their normal length, A bands remain unchanged in length, I bands shorten, and H zones are narrowed.

Muscle contraction and relaxation. Interdigitation of thick and thin filaments…

Hand-held model of a sarcomere to illustrate the sliding filament mechanism in muscle contraction | Advances in Physiology Education

Hand-held model of a sarcomere to illustrate the sliding filament mechanism in muscle contraction

This is page of muscle notes. It puts the process in a diagram form that makes it more applicable for learning the steps.

This is page of muscle notes. It puts the process in a diagram form that makes it more applicable for learning the steps.

Best Sliding Filament theory explanation video I've found so far.

sliding filament theory of muscle contraction - created by Sara Egner as part of UIC's biomedical visualization program

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