Skeleton
Skeleton
- Unit 1: Cells
- Unit 2: Organisms
- Unit 3: Microorganisms
- Unit 4: Digestion and excretion
- Unit 5: Respiration
- Unit 6: Circulatory System
- Unit 7: Nervous System
- Unit 8: Senses
- Unit 9: Musculoskeletal
- Unit 10: Endocrine System
The Movement System
We know that motor signals are sent from the central nervous system to the muscles, causing them to contract and produce movement. But what other parts of the body are involved in creating movement?
In addition to the nervous and muscular systems, the presence of bones is essential for movement. Together, the muscles and bones form the musculoskeletal system, which enables movement in the body.
Quick Fact
The musculoskeletal system is made up of bones, muscles, and joints working together with the nervous system to produce voluntary movement.
Important Concept
The movement system involves the collaboration of the nervous system, muscles, and bones. Muscles contract in response to nerve signals, and bones act as levers to enable movement.
Common Mistake
It is incorrect to think that muscles alone control movement. Without bones and joints, muscles would have nothing to pull against — and movement wouldn’t be possible.
Questions
Show Answer
The nervous system, muscular system, and skeletal system work together to produce movement in the body.
Skeleton
The collection of bones, cartilage, and joints in the body is known as the skeleton.
Most bones are initially made of cartilage. These cartilaginous parts later absorb minerals like calcium and phosphorus during growth and gradually become hard bone.
Bones have several important functions. They support the body, give it shape, and protect vital organs such as the brain, heart, and lungs. They also assist with movement by serving as attachment points for muscles. In addition, bones store minerals and produce blood cells in the bone marrow.
The skeleton is made of bone and cartilage and is a type of tissue. This tissue is composed of a matrix that includes protein fibers and mineral materials.
Quick Fact
Your bones are constantly changing — they grow, repair, and even release minerals into your bloodstream when needed.
Important Concept
The skeleton not only supports the body and protects vital organs, but also stores minerals and produces blood cells. Its structure is made of both bone and cartilage, which develop from softer cartilage during growth.
Common Mistake
Many people think bones are dry and lifeless. In fact, bones are living tissues that grow, repair themselves, store minerals, and produce blood cells in the marrow.
Questions
Show Answer
The skeleton supports the body, gives it shape, protects internal organs, helps with movement, stores minerals, and produces blood cells.
Show Answer
Bones begin as cartilage. As the body grows, minerals like calcium and phosphorus are absorbed, turning the cartilage into hard bone.
Did You Know?
This diagram shows the human skeleton along with the names of some key bones — including the skull, spine, ribs, pelvis, and limb bones. Knowing these helps you better understand how the skeletal system supports and protects the body.
