Muscle in humans has an average density of 1055.
At rest, it has an alkaline reaction; but under the influence of fatigue, as well as under the influence of repeated excitations, this reaction becomes acidic, due to the formation of sarcolactic acid. It contains about 74 to 78 p. 100 percent water and a large number of substances, which can be classified into the three main classes :
|
Albuminoid material |
16 à 29% |
|
Extractive Substances |
0,2 à 1% |
|
Mineral materials |
3 à 3,5% |
The supra-spinatus muscle (French: Muscle supra-épineux) is named from its position above the spine of the