In the embryonic stage, the testis is located in the scrotum.
举一反三
- When do the testis descend into the scrotum in normal condition? () A: Fetal development B: Infancy C: Puberty D: Adulthood
- Which<br/>is wrong about the structure of testis? () A: Thetunica<br/>albuginea is thickened on the posterior<br/>surface of<br/>testis to form mediastinum B: The<br/>fibrous septa from mediastinum<br/>penetrates radially the testis, dividing it into pyramidal lobules C: Each<br/>lobule is occupied by 1-4 seminiferous tubules D: Theseminiferous<br/>tubules go into mediastinum testis to form rete testis E: The tubulus<br/>rectus go into mediastinum testis to form rete testis
- human embryonic stem cell
- embryonic stem cell，ES (胚胎干细胞)
- The efferent ductules of testis empty into the() . A: rete testis B: epididymis C: ductus deferens D: straight tubules E: seminiferous tubules