Answer: hormones
Explanation:
The endocrine system uses the hormones secreted by its various glands to exert functions such as;
- regulation of bone calcium by Parathormone
- regulation of body metabolism by Thyroxine
- selective reabsorbtion of water from urine by the Anti-diuretic hormone (ADH)
- development of sexual characters in males and females by testosterone and oestrogen respectively.
