Relation between Hatschek's pit and pituitary?

Answer 1

they are both connected to the brain system.. i dont know exactly..

Answer 2

There is no relation between the two. Hatschek's pit is concerned with excretion in Amphioxus. The dorsal outpushing of the pharynx which gives rise to the posterior lobe of the pituitary in vertebrates is a different issue.

Answer 3

Hatschek's pit - In the lancelet Hatschek's pit, also called Hatschek’s nephridium, is an unpaired kidney whose duct opens into the anterior pharynx. It can be seen as a deep ciliated fossa on the dorsal midline of the buccal cavity (mouth). Among other things, it secrets mucus which entraps food particles from the water.

Pitutiary - an unpaired compound gland suspended from the base of the hypothalamus by a short extension of the infundibulum, the infundibular or pituitary stalk. The hypophysis consists of two major subdivisions: 1) the neurohypophysis, comprising the infundibulum and its bulbous termination, the neural part or infundibular process (posterior lobe), which is composed of neuroglia-like pituicytes, blood vessels, and unmyelinated nerve fibers of the hypothalamohypophyseal tract whose cell bodies reside in the supraoptic and paraventricular nuclei of the hypothalamus, and convey to the lobe for storage and release the neurosecretory hormones oxytocin and antidiuretic hormone; 2) the adenohypophysis, comprising the larger distal part, a sleevelike extension of this lobe (infundibular part) that invests the infundibular stalk, and a thin intermediate part (poorly developed in humans) between the anterior and posterior lobes; the anterior lobe consists of cords of cells of several different types interspersed with capillaries of the hypothalamohypophysial portal system; secretion of somatotropins, prolactin, thyroid-stimulating hormone, gonadotropins, adrenal corticotropin, and other related peptides in the adenohypophysis is regulated by releasing and inhibiting factors elaborated by neurons in the hypothalamus that are taken up by a primary plexus of capillaries in the median eminence and transported via portal vessels in the infundibular part and infundibular stem to a secondary plexus of capillaries in the distal part.