Sarcoplasm Interfibrillar

It is a noun that refers to the intercellular material that is found between muscle fibers in muscle fiber and muscle. Sarcoplasm is the cytoplasm of the muscle cell and organelles: sarcoplasmic reticulum, voccula and mitochondria.

Muscle cells are cylindrical in shape. Muscle fiber diameter - 15 microns; the distance between adjacent fibers is up to 200 microns; muscle diameter - on average about a centimeter; The thickness of some muscles does not exceed a couple of millimeters. Muscle fibers are structurally homogeneous cells and contain only myoglobin, but at the same time they are distinguished by significant volumetric density, since muscles consist of many parallel fibers. Muscle fibers free from impurities contain about 70% water and protein substances such as mitogen, myosin, potassium, magnesium citrate, phosphorus pyrophosphate. The main protein of muscle fibers is myoglobin. In humans, its molecular weight ranges from 17 to 18 thousand Da and its content in muscles reaches 4-5%. The blood flowing to the heart is constantly enriched with oxygen contained in the air. Myocardial tissue contains relatively little oxygen, since the small capillaries connecting arterioles to veins are essentially anastomoses, but not capillaries. Therefore, myocytes are exposed to hypoxia and oxygenation and are provided by their own circulatory system. If we try to inject gas through a thin catheter, we will notice that it penetrates best into the muscle at its maximum contraction or moving dilated state.