| Structure |
Description |
Function |
| Skeletal Muscle |
Voluntary, Striated, Multinucleated |
Articular Movement/Support and Posture (anti-gravitational) |
| Muscle Mass |
Organ Level |
Tendons: attach Muscle to Bone; superficial Fascia: connective tissue; Blood Vessels and Nerves |
| Muscle Fibers |
Multinucleated, Striated, Uni-directional |
bound by a Sarcolemma membrane and supplied with a branch of 1 motor nerve |
| Myofibril |
Sub-cellular |
1000/cell |
| Myofilament |
Molecular Level - made of Myosin: Thick protein filament; and Actin: Thin protein filaments |
Sliding Filament Action: Myosin cross-bridges pull Actin over Myosin ---> shortening Sarcomere unit (contraction) |
| Sarcomere |
section from z-line to another |
contains1 Myofilament/section of Myosin and Actin |
| Z-line |
anchors within the Myofilament |
Stabilize the filament |
| Tendon |
Inelastic cord; made of Dense REGULAR connective tissue |
connecting MUSCLE to BONE |
| Aponeurosis |
a Wide, FLAT tendon |
connecting MUSCLE to MUSCLE |
| Retinaculum |
a Ligamentous band |
holding TENDONS in place, providing a Point of LEVERAGE |
| Epimysium |
(Superficial Fascia) Dense, IRREGULAR connective tissue sheath |
around entire Muscle Mass |
| Perimysium |
INTERNAL Fascia |
binding parallel fibers, forming FASCICULI |
| Endomysium |
RETICULAR connective tissue |
Between Fibers |
Science Vocab 147928
