How are the various processes occurring in the human body controlled ? In how many ways ?

Explanation

(i) Various organ systems are continuously performing their functions in human body.
(ii) Along with the various systems like digestive, respiratory, circulatory, excretory and control systems, different external and internal organs are performing their functions independently but through a complete co-ordination.
(iii) This is controlled in two ways-Nervous control by nervous system and chemical control by the hormones secreted by the endocrine glands.