Egypt is by some definitions part of the Middle East, geographically it is a transcontinental country, the bigger part of the country stretches along the Nile in North Africa while the Sinai Peninsula is in Western Asia.
See interstitial cell. The testosterone-secreting cell of the testis which is located in clusters in the interstitium between the seminiferous tubules. Leydig cells are large and have centrally located nuclei, eosinophilic cytoplasm and numerous lipid-filled cytoplasmic vacuoles.Function.ee interstitial cell. The testosterone-secreting cell of the testis which is located in clusters in the interstitium between the seminiferous tubules. Leydig cells are large and have centrally located nuclei, eosinophilic cytoplasm and numerous lipid-filled cytoplasmic vacuoles.
Leydig cell testosterone synthesis is divided into three functional modules: (1) the steroidogenic machinery, consisting of the P450 and HSD enzymes responsible for the conversion of cholesterol to testosterone, as well as accessory enzymes and cofactors; (2) the cholesterol transfer apparatuses, including the enzymes responsible for hydrolysis of stored cholesteryl esters, movement of cholesterol to the mitochondria, and transfer of cholesterol across the double mitochondrial membranes by ...