External Intercostal Muscles
Skeleton | Skeletal System Overview
The adult human skeleton is a framework of 206 bones and is anatomically divided into two parts, the axial skeleton, and the appendicular skeleton.
The axial skeleton is the core of the skeleton, it consists of the following 80 bones:
The appendicular skeleton is attached to the axial skeleton. It consists of 126 bones.
Bony Pelvis: 2 bones (Os coxae).
Functionally, the bones primarily give support to the appendages and protect the fragile organs of the body such as the brain, spinal cord, heart, and lungs.
They also store calcium and phosphorus in the hard bone matrix, which can be released when needed elsewhere.
The bumps, ridges, and grooves on the surface of bones provide attachment sites for the skeletal muscles.
Additionally, many bones contain a soft tissue called marrow that produces new blood cells and stores fat.