### Theory:

Introduction:
The movement of the animals or the human body occurs in a variety of ways. Certain parts of the body can be moved in various directions, and some features can be moved only in one direction. All these movements and their variations are because of the bones that are attached by joints.
The bones found in the body of humans form a framework known as the skeleton that gives shape to the body.
The human skeleton:
The skeleton is a structural framework of bones which are linked together by joints. In humans, there are around $$305$$bones at birth. With the increase of age, some of the bones fuse resulting in only $$206$$bones that make up the skeleton. The human skeleton is divided into the :
1. Axial skeleton
2. Appendicular skeleton
The skull, vertebral column and the chest bone make up the axial Skeleton.
The appendicular Skeleton includes the pelvic bone and the bones of the arms and legs.

Skull:

The skull is a structure that is made up of many bones joined together to enclose and protect the brain.

Vertebral column:

It is also known as the backbone. It consists of many small bones called vertebrae that are $$33$$in number. A person can bend over only due to the presence of this bone.

The Chest bones:

It is also known as the rib cage. There are $$12$$ribs on each side of the chest that are joined to the central chest bone and the backbone. They enclose the important organs such as the lungs and the heart.

Bones of the arms:

Some of the bones of the arms are theshoulder bones and the carpels.
The two prominent bones on the back are known as the shoulder bones and the bones of the wrist, and the palm are known as the carpels. One can fold their fingers only due to these carpels.

Pelvic bone:

It is a structure that encloses the portion of the body below the stomach. A person can sit only because of this bone.

Important!
Note: Some of the other structures included in the skeletal system are the Cartilage and the muscle.
The soft structure found in between the joints of the skeleton and the upper portion of the ear lobe is known as a Cartilage.
The soft contractile tissue that is attached to the bones is known as Muscle.
Reference:
https://www.shutterstock.com/image-photo/human-skull-on-isolated-white-background-194829002
https://www.shutterstock.com/image-vector/spine-bones-isolated-on-white-photorealistic-1124507528
https://www.shutterstock.com/image-illustration/protextora-bone-rib-cage-internal-organs-323122553
https://www.shutterstock.com/image-vector/vector-illustration-human-forearm-skeleton-anatomy-1090667198
https://www.shutterstock.com/image-vector/pelvic-bones-vector-medical-illustration-786131218