MUSCULO-SKELETAL SYSTEM- LONG BONE: STRUCTURES AND FUNCTIONS

What is a long bone mainly made of?

Compact bone

What is an articular cartilage?

-Cover epiphysis -Smooth, hard -Reduces friction in joints

What is a compact bone?

-Covers outside of diaphysis -Dense, strong, hard

What are growth plates?

-Found in epiphysis -Growth of length -Fuse in adulthood

What is a medullary cavity?

-Hollow in center of diaphysis -Contains bone marrow

What is spongy bone?

-In epiphysis -NOT soft, light, hard

What is bone marrow?

-Yellow in cavity -High in fat -Red epiphysis high in rbc producing cells

What is periosteum?

-thin -membrane covering diaphysis -helps bone grow wider -attachment site for tendons

What do the centre of long bones contain?

Bone marrow ( a soft, fatty substance) and blood vessels.

What is an example of a long bone?(2)

Femur or hummers

Describe what a long bone looks like.

Longer than they are wide, they have a thin body (diaphysis), with two rounded extremities called the epiphysis.

Where are long bones usually found?

Mostly in the limbs

What are parts of long bone?

Periosteum Medullary Bone marrow Growth plates Articular cartilage Compact bone Spongy bone