Human Skeleton

Human Skeleton provide the structure for our bodies. The adult human skeleton is made up of 206 bones. A baby’s body has about 300 bones at birth.

The Human Skeleton can be divided into the axial skeleton(The vertebral column, Rib cage, Skull) and the appendicular skeleton(Shoulder girdle, pelvic girdle, bones of the upper and lower bones).

GK Quiz Human Skeleton important for SSC, UPSC, Railway and other Exam

• Skull
• Spine
• Chest
• Arms
• Hands
• Pelvis
• Legs
• Feet

Skull–

• The skull is bony structure that supports the face and forms a protective cavity for the brain.
• The skull consists of 22 individual bones, 21 of which are immobile and united into a single unit. The 22nd bone is the mandible, which is the only moveable bone of the skull.
• The skull is composed of two parts: 1.Cranium 2.Mandible
• The skull consistes of 8 cranial bones and 14 facial bones.
• The 8 cranial bonws fro the bulk of your skull. They help to protect your brain.
• There are 14 facial bones. They are found on the front of the skull and make up the face.
• Mandible Bone is the only movable bone in the skull of Human Skeleton.

Spine–

• The spine is made of 33 individual bones stacked one on the top of the other.
• There are 7 cervical vertebrae, 12 thoracic vertebral and 5 lumber vertebrae.
• This spinal column provides the main support for your body, allowing you to stand upright, bend and twist.

Chest- There are usually 26 bones in the chest but sometimes there can be aditional cervical ribs in humans. Chest is made from three bones Hyoid Bone, Sternum and Ribs.

• Hyoid Bone- The Hyoid bone is a horseshoeshaped bone situated in the anterior midline of the neck between the chin and the thyroid cartilage.
• Sternum- Sternum is a long flat bone located in the central part of the chest.
• Ribs- The ribs cage is the arrangement of ribs attached to the vertebral column and sternum in the thorax.

Arms– The arms are the upper limbs of the body. They are some of the most complex and frequently used body parts. There are a total of 64 bones in the arms.

Each arm consists of four main parts-

• Upper Arm
• Forearm
• Hand

Upper Arm– The upper arm includes the shoulder as well as the area between the shoulder and elbow joint.

Bones of Upperarm-

• Scapula– The scapula is also called the shoulder blade.
• Clovide– The clovide is also called the collarbone.
• Humerus– The humerus is a long bone in the upperarm.

The upper arm also contains several joints-

• Acromioclavicular Joint– The scapula and the Clovide meet at the joint.
• Glenohumeral Joint– This is the joint where the scapula and humerus meet.
• Sternoclavicular Joint– The Clovide connects to the sternum at this joint.

Forearm– The forearm is the area between the elbow joint and the wrist. Its two major bones are the radius and the Ulna.

Hand– Hands are capable of a wide variety of function, including gross and fine motor movements. Each hand consists of 19 bones.

The hand can be considered in four segments-

• Fingers– Digits that extand from the palm of the hand, the fingers make it possible for humans to grip the smallest of object.
• Palm– This is the bottom of the body of the hand.
• Back– The back of the hand shows the dorsal venous network, a web of veins.
• Wrist– The connection point between the arm and the hand, the wrist enables hand movements.