Skeletal And Muscular Systems

Human skeleton has many functions

Calcium and other minerals makes the bone strong

Making of blood cells

Movement

Protects vital organs

Helps the body move

Supports the body

e.g: skull protects the brain

Makes blood cells

Bones can repair themselves

cells such as red or white blood cells are made in the bone marrow

Bone marrow is a soft tissue found inside our larger bones

Bones are linked together by joints

Arthritis is a condition in which bones wear away by moving against each other

e.g of joints: Hinge joint or ball and socket joint

To avoid this a synovial joint is formed

End of bones are covered by cartilage(strong substance)

Cartilage is kept slippery by a liquid called synovial fluid

Tough ligaments join the bones

Muscles

Bones cannot work on there own

Muscles are attached to bones to help them move(contraction)

However a muscle can only pull but not push so two muscles are attached

These muscles are called antagonistic muscles

E.g of antagonistic muscles: Biceps