Answer:
Leukocytes cell
Explanation:
Also known as white blood cell are colorless cell in the blood and body fluid , active in fighting foreign bodies and diseases in human system by producing antibodies , ingesting strange bodies ,and destroying cancer cells .
It is produced by hematopoietic cells
There are five different types of it with different functions of disease fighting namely basophils , neutrophils ,eosinophils,monocytes and lymphocytes.
Exercise activities can increase the number in the system while rest takes it down
