12 Major Human Body System

This is an essay on the 12 major human body systems, which are skeletal, muscular, nervous, endocrine, reproductive, respiratory, excretory, circulatory, integumentary, lymphatic, digestive and the immune system. Each of these systems are important for the body and help the body in its own unique way. If one fails, it may cause a domino effect and cause the downfall of another system.

Here we are going to start with the skeletal system. The skeleton is a flexible framework that supports the body, protects vital organs, and anchors the muscles that move the body. In an average adult, there are 206 bones but around 305 bones at birth. This decreases after some bones slowly fuse together.
There are two parts of the skeletal system. The axial