chapter 5 Skeletal system _Hystology

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Part of the skeletal system

Bones, Joints, cartilages and ligaments.

What are the two subdivision of the skeletal system?

Axial skeletal and appendicular skeletal.

List the functions of the skeletals system?

support the body, protect soft organs, allow mouvement dut to attached skeletal muscles, store minerals and fats, and blood cell formation.

What is the total number of bones in the human body?

the adult skeletal has 206 bones.

List two basic type of blood tissue

Compact and spongy bone.

What are the characteristics of a compact bones?

A compact bone is dense and looks smooth and homogenous.

What are the characteristics of a spongy bone?

Small needle-like piece of bone and lots of open space.

How are bones classified?

Classified by long bones, short bones, flat bones irregular bones.

Describe long bones

Long bones are typically longer than they are wide, have a shaft with heads at both ends and contains mostly compact bones

Example of long bones

Femur and humerus.

Describe short bones

Generally cube- shape, contains mostly spongy bone

Example of short bone

Carpals and tarsals

Describe flat bones

Thin, flattened and usually curved, two thin layers of compact compact bones and one middle layer of spongy bone

Example of flat bones

Skull, ribs, sternum

Describe irregular bones

Irregular shape. it cannot be classified into the other categories

Example of irregular bones

Vertebrae, and hip bones

Diaphysis

Body of the long bone composed of mostly compact bone.

Epiphysis

Ends of long bones composed of mostly spongy bone.

Periosteum

outside covering of the diaphysis. (Fibrous connective tissue)

Sharpey's fibers

Secure periosteum to underlying bone

Aticular Cartilage

Covers the epyshysis

epiphyseal plate

Hyaline cartilage seen in the young later transform to epiphyseal plate.

Epiphyseal line

Dry Hyaline cartilage seen in an adult. Pre-transformed of epiphyseal line,

Medullary Cavity

Cavity inside the long bone shaft that contains yellow blood marrow in adlults and in infants it contains red blood cell formation,

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