How many body system are there

There are 11 major organ system in the human body,which include the circulatory,respiratory,digestive,excretory,nervous and endocrine system.The immune,integumentary,skeletal,muscle and reproductive system are also part of the human body.

Explanation:

Explanation:

There are 12 body system.They are the integumentary, skeletal, muscular, nervous, endocrine, cardiovascular, lymphatic, , digestive, urinary, and reproductive systems. Also,There are 11 major organ systems in the human body, which include the circulatory, respiratory, digestive, excretory, nervous and endocrine systems.

answer; genes dictate the production of specific enzymes, and affected individuals have genetic defects that cause them to lack certain enzymes;