Chapter 10Muscular System Flashcards
Movement functions of muscles
-move from place to place
-move body parts
-move body contents in breathing and digestion
-communication
Stability functions of muscles
-maintain posture
-antigravity muscles (prevents us from falling over)
-stabilize joints by maintaining tension
Sphincters
Internal muscular rings that control the movement of food, blood and other materials within body
Three types of muscle tissue
-skeletal, cardiac, smooth
Specialized major purpose of muscle tissue
Converting the chemical energy in ATP into mechanical energy of motion
Myology
The study of the muscular system
Endomysium
-Thin sleeve of loose connective tissue around each fiber
-allows room for capillaries and nerve fiber
-provides chemical environment for muscle fiber
Perimysium
-thicker layer of connective tissue that wraps fascicles
Fascicles:
-Bundles of muscle fibers wrapped together
-carries nerves, blood vessels and stretch receptors
Epimysium
-fibrous sheath surrounding entire muscle
-outer surface grades into fascia
Fascia
Sheet of connective tissue that separates neighbouring muscles or muscle groups from each other
Fusiform muscles
Thick in middle and narrow at each end
Parallel muscles
Uniform width and parallel fascicles
Triangular muscles
Shaped like triangle
-broad at one end narrow at the other
Circular muscles
Forms rings around body openings
