Answer:
its circadian rhythm coordinated by pineal gland through melatonin hormone that it produces!!
Answer: Emergency procedures are basically those that are life threatening. Elective procedures may be important but you have to wait or plan For the appropriate time and space.
Explanation:
Adaptive immunity can be acquired during either 'naturally' (by infection) or 'artificially' (through deliberate actions such as vaccination). Adaptive immunity can also be classified as 'active' or 'passive'
