Human skeleton consists of 206 bones. It performs the following functions:
- It helps in the movement of various body part.
- It provides shape and support to the body.
- It protect the soft internal organs.
- Bones are filled with a substance called marrow, which produces blood cells.
Parts of the human skeleton:
- This is the uppermost part of the skeleton which forms the framework of our face and head.
- It protects our brain from injury.
- It made up of many small bones and all bones in the skull are fixed except of The Lower Jaw.
- The movable lower jaw allows us to speak and chew food.
- It is a set of bones that enclose the heart and lungs and it present in the front part of our body below the neck.
- It is made up of small strips of bones called ribs.
- A long bone at the center of the chest is called sternum.
- It holds the ribs in the front.
- It is also attached to the backbone.
- The last two pairs of ribs are not attached to the sternum, they are called floating ribs.
- It's movements help in breathing.
- It protects the heart and lungs from any injury
- It is made up of smaller bones called vertebrae arranged in a chain.
- It is also known as the vertebral column.
- There are normally 33 vertebrae in it..
- Bending would not have been possible if it would have been made of a single long bone, instead of vertebrae.
- The ribs are attached to the backbone.
- The backbone gives support to the body.
- It also known as the pectoral girdle, it consists of the shoulder bone and the collarbone.
- The shoulder girdle supports the bones of the arm.
- Also known as the pelvic girdle, it consists of hip bones.
- The pelvic girdle supports the bones of the leg.
Bones of the Upper Limb
- Our arm consists of one long bone called humerus which is attached to the shoulder.
- Two bones below the elbow are radius and ulna.
- A group of small bones in the wrist, hand and fingers are carpals and metacarpals.
- All the bones help us in gripping, holding and writing.
Bones of th lower limbe:
- Our leg has one long bone above the knee called femur.
- It is the longest bone in the body.
- Two bones below the knee are tibia and fibula.
- A group of small bones in the ankle, foot and toes are tarsals and metatarsals.