Amazing Health Benefits
A system is an organization of varying numbers and kinds of organs so arranged that together they can perform complex functions for the body.
Ten major systems include the skeletal, muscular, nervous, endocrine, cardiovascular, lymphatic, respiratory, digestive, urinary, and the reproductive system.
The human body is a single structure, but it is made up of billions of smaller structures of four major kinds: cells, tissues, organs, and systems. An organ is an organization of several different kinds of tissues so arranged that together they can perform a special function