SKELETAL SYSTEM

Skeletal System

The system made up of bones, cartilage, and ligaments, providing support, protection, and enabling movement.

Bone Marrow

Soft, spongy tissue in hollow centers of bones, producing red and white blood cells.

Axial Skeleton

The part of the skeleton that includes the skull, spine, and ribcage.

Appendicular Skeleton

The part of the skeleton that includes the limbs and pelvis.

Support

The function of the skeletal system that provides a framework for the body and supports its weight.

Protection

The function of bones that safeguards vital organs from injury.

Movement

The ability provided by bones and muscles to perform various physical activities.

Blood Cell Production

The process performed by bone marrow that produces red and white blood cells.

Long Bones

Bones that are longer than they are wide, found in arms, legs, hands, and feet.

Flat Bones

Thin and broad bones, such as those in the skull, ribs, and shoulder blades.

Irregular Bones

Bones with complex shapes, including those in the spine, hips, and face.

Compact Bone

The hard outer layer of bone that is dense and strong.

Spongy Bone

The inner, porous part of bone tissue that contains marrow and blood vessels.

Periosteum

A thin, fibrous membrane that covers the outer surface of bones.

Pivot Joints

Joints that allow for rotational movement, such as in the neck and wrist.

Ball-and-Socket Joints

Joints that permit movement in multiple directions, found in the hips and shoulders.

Hinge Joints

Joints that allow movement in one direction, such as the elbow and knee.