Muscle Tissue Types
Voluntary, striated muscle attached to bones
Skeletal muscle
Contractile unit of a muscle
Sarcomere
Thin filament in sarcomere
Actin
Bone forming the forehead
Frontal bone
Rounded joint surface
Condyle
Involuntary, striated muscle found only in the heart
Cardiac muscle
Muscle cell membrane
Sarcolemma
Thick filament in sarcomere
Myosin
Suture between the parietal bones
Sagittal suture
Shallow depression
Fossa
Involuntary, non-striated muscle found in organs & vessels
Smooth muscle
Connective tissue around one muscle fiber
Endomysium
Band with only thick filaments
H-zone
Only movable skull bone
Mandible
Hole for nerves or vessels
Foramen
Structures that help heart muscle cells communicate
Intercalated discs
Connective tissue around a fascicle
Perimysium
Neurotransmitter that triggers contraction
Acetylcholine
First cervical vertebra
Atlas
Soft spot in infant skull
Fontanel
What gives skeletal muscle its striped appearance
Striations
Connective tissue around whole muscle
Epimysium
Theory explaining how filaments slide to shorten muscle
Sliding filament theory
Butterfly-shaped bone with sella turcica
Sphenoid bone
Joint allowing all angular movement & rotation
Ball-and-socket joint