Below are main organ systems and their function÷ • Gaseous exchange system (animal) ÷ brings about gaseous exchange • Nervous and endocrine system (animal) ÷ regulate body functions and adjust the body to the environment. • Reproductive system ÷ produces new individuals. • Body covering (integumentary) system ÷ protects the body from the external environment. • Circulatory or vascular system ÷ transport materials around in the body. •.... More click here >>> www.rowlandokonko.com/2016/01/organ-systems-and-their-functions.html?m=0