Luteinizing hormone or LH
ICSH aka Gonadotrophin. Produced by the anterior pituitary gland, it stimulates the production of Testosterone from the Leydig cells (aka Insterstitial cells) in males and assists with ovulation in females.
The interstitial cell-stimulating hormone stimulates ovulation in the female and production of the female sex hormone progesterone. In the male, it stimulates the secretion of testosterone.
In the testes, or testicles, there are a group of cells called the interstitial cells of Leydig. Their main purpose is to produce the hormone testosterone,
interstitial cells
Cells within the kidney called interstitial fibroblasts produce a substance called erythropoietin, EPO for short, that stimulates production of red blood cells. They doesn't secrete or produce red blood cells themselves. Red blood cells are produced within bone marrow.
Testosterone
The fluid located in the space between the cells is known as extracellular fluid.
Interstitial Fluid
Fluid similar to seawater that surrounds and bathes all body cells is called interstitial fluid. It contains glucose, salt, fatty acids and minerals such as calcium, magnesium and potassium, and acts as a fueling station of nutrients for our cells.
The interstitial cells of Leydig in the testicles produce testosterone.
These are the interstitial cells.