Aldosterone from adrenal medulla
The neurohypophysis releases vasopressin (antidiuretic hormone), which inhibits diuresis by enhancing renal water reabsorption.
The basic filtration unit of the excretory system in human beings is:
| Column I | Column II | ||
| a | 6- 15 pairs of gill slits | i | Trygon |
| b | Heterocercal caudal fin | ii | Cyclostomes |
| c | Air Bladder | iii | Chondrichthyes |
| d | Poison sting | iv | Osteichthyes |