The observations show that pars nervosa is composed of monmyelinated nerve fibres and terminals, pituicytes, ependymal cells, blood capillaries and connective tissue.

• 观察结果表明,脑垂体神经叶由无髓神经纤维及末梢、垂体细胞、室管膜细胞、毛细血管、结缔组织构成。