Labels:text | screenshot | black | black and white | document | monochrome OCR: iterior lobe The pituitary is a composite gland, the a being derived from an evagination of th pouch, stomodeal ectoderm known as Rathke's of the while the posterior lobe is an extension n gland is forebrain. The weight of the adult hum per cent, approximately 620mg; in women, twent gland is principal and in men, twenty-five per cent, of this posterior pituitary. Nervous tissue is th component of the posterior pituitary. Th e pituitary immediate anatomical relationship of th n in Fig. 5.1gland with surrounding structures is se