Sinus is a type of capillary, also called sinus capillary, which is mainly distributed in the liver, spleen, bone marrow and some endocrine glands. It is the area where blood enters the tissue gap from blood vessels.
- Chinese name
- Blood sinus
- Foreign name
- sinusoid
- Formation
- The blood flows through the gap and becomes a blood sinus
- Cause
- Because the true body cavity is underdeveloped
Characteristics of blood sinus : Large lumen, irregular shape, endothelial cells There may be a large gap between them. Some sinus endothelial cells have a fenestra. The basement membrane under the endothelium is either connected, disconnected, or absent. The structure of blood sinus in different organs is quite different 
