How is the Human Skeleton Made?
The human skeleton is a complex structure made up of bone, cartilage, and ligaments. It provides support, protection, and mobility to the body. The skeleton consists of 206 bones, which are divided into two main categories: axial and appendicular.
Axial Skeleton: * Consists of bones that form the central axis of the body, including the skull, spinal column, and rib cage. * Protects the brain, spinal cord, and internal organs. * Provides support for the head, neck, and trunk.
Appendicular Skeleton: * Consists of bones that attach to the axial skeleton and form the limbs, including the arms, legs, hands, and feet. * Provides mobility and allows for movement. * Transmits forces between the body and the external environment.
Structure of Bone: Each bone in the skeleton consists of several layers:
- Periosteum: A thin membrane covering the outer surface of the bone that contains blood vessels and nerves.
- Compact Bone: A dense outer layer that provides strength and rigidity.
- Spongy Bone: A porous inner layer that absorbs shock and provides a site for red bone marrow.
Cartilage: Cartilage is a specialized connective tissue that helps to connect bones and provide support for joints. It is found in the knee, hip, and shoulder joints, as well as in the ears and nose.
Ligaments: Ligaments are tough bands of tissue that connect bones together at joints. They help to stabilize joints and prevent dislocation.
Related Questions and Answers
- What is the function of the human skeleton?
- It provides support, protection, and mobility to the body.
- How many bones are there in the human skeleton?
- 206
- What is the difference between axial and appendicular skeletons?
- Axial skeleton forms the central axis, while appendicular skeleton forms the limbs.
- What are the main layers of a bone?
- Periosteum, compact bone, and spongy bone
- What is the role of cartilage in the human skeleton?
- It connects bones and provides support for joints.
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