1. Muscle Physiology

2. Types of Muscle Skeletal Smooth Cardiac Attached to bones
Makes up 40% of body weight
Responsible for locomotion, facial expressions, posture, respiratory movements, other types of body movement
Voluntary in action; controlled by somatic motor neurons
Smooth
In the walls of hollow organs, blood vessels, eye, glands, uterus, skin
Some functions: propel urine, mix food in digestive tract, dilating/constricting pupils, regulating blood flow,
In some locations, autorhythmic
Controlled involuntarily by endocrine and autonomic nervous systems
Cardiac
Heart: major source of movement of blood
Autorhythmic

3. 1- Skeletal Muscle Structure
Muscle = group of fascicles
Muscle fibers extend length of muscle from tendon to tendon

4. Connective Tissue of a Muscle
Epimysium. Dense regular c.t. surrounding entire muscle
Separates muscle from surrounding tissues and organs
Connected to the deep fascia
Perimysium. Collagen and elastic fibers surrounding a group of muscle fibers called a fascicle
Contains b.v and nerves
Endomysium. Loose connective tissue that surrounds individual muscle fibers
Also contains b.v., nerves, and satellite cells (embryonic stem cells function in repair of muscle tissue
Collagen fibers of all 3 layers come together at each end of muscle to form a tendon or aponeurosis.

5. Connective Tissue of a Muscle
Epimysium. Dense regular c.t. surrounding entire muscle
Separates muscle from surrounding tissues and organs

6. Connective Tissue of a Muscle
Perimysium. Collagen and elastic fibers surrounding a group of muscle fibers called a fascicle

7. Connective Tissue of a Muscle
Endomysium. Loose connective tissue that surrounds individual muscle fibers

8. Fig

11. Fig

13. Fig

18. Fig