Irregular long tapered shape

The cell body extends from the base of the seminiferous epithelium to the luminal surface

The cell outline is unclear (spermogenic cells at all levels are embedded on the side)

The nucleus is oval or triangular, lightly stained, and has obvious nucleoli.

Steroid hormone cell characteristics

tight connection

Supports and nourishes spermatogenic cells at all levels

Synthetic and secreted androgen binding protein

Secretion of inhibin (feedback inhibition of pituitary secretion of follicle-stimulating hormone)

Phagocytosis and digestion of residual cytoplasm

Involved in the composition of the blood-testis barrier

Type A

Type B

The nucleus is large round, globular, with thick or thin chromatin filaments.

Primary spermatocytes at different stages of division can be seen in the section of the reproductive tubules.

Nuclear round color dark

The section of seminiferous tubules is difficult to see

Nucleus is round, chromatin is dense

sperm formation

include

condition

Cryptorchidism (male infertility)

The number of abnormal sperm is greater than 40% (male infertility)

Initiate and maintain spermatogenesis

Promote the development of male reproductive organs

Maintain male secondary sex characteristics

Maintain sexual function