00:01
The given question is, describe the structure of strated skeletal muscles including the definitions and functions of myofibrils, myofilaments, fascicles, myosin filaments, actin filaments, sarcomeres and z -lines.
00:12
So, skeletal muscle is the strated, its long, thin, multi -nucleated fibers are crossed with the regular pattern of fine, red and white lines, giving the muscles distinct to appearance.
00:23
Skeletal muscles, strated, skeletal muscles, fibers are bound together by conventional.
00:38
Tissue and communicate with nerves and blood vessel.
00:42
The structure of tredded or skeletal muscle, strated muscle tissue, such as the tissue of a human bicep muscles, consist of long, fine fibers, each of which is an effect of a bundle of finer myofibrils.
00:54
Within each myofibrils are filament of the protein, myocene and actin.
00:58
This filament slide past on one another as the muscle contracts and expands as muscle contract and expand.
01:14
On each myofibril regularly occur in dark bands called z -lines.
01:19
Can be seen where actin and myosine filaments overlap the region between two z -lines is called a sarcomere.
01:25
Sarcomeres can be considered the primary structural and functional unit of muscle tissue.
01:30
Now, let us start the function and the definitions of the myofibrils, myofilaments, fascicles, myosine filament, actin filament and sarcomere and z -lines.
01:44
So the first one, myofibrils.
01:52
Myofibrils are made up of sarcomeres, the functional units of muscle, the function of myofabble is purpom muscle contraction via the sliding filament model.
02:06
When muscles are at risk there is incomplete overlap between the thin and thick filament with some areas containing only one of the two types.
02:15
In cardiac and skeletal muscles, myofilament are key molecular regulators of the contraction.
02:29
Key molecular regulators of the contraction indeed thick, thin filament interactions while the formation of myosine cross bridges lead to a force production and motion.
02:49
Now next one, fascicles...