science Untitled Flashcards Set

Skeletal System

The organ system that supports and protects the body and allows movement with help from the muscular system.

Endoskeleton

A skeleton that is located inside the body.

Exoskeleton

A skeleton that is located on the outside of the body.

Axial Skeleton

Includes the skull, vertebrae, and ribs, which support and protect internal organs.

Appendicular Skeleton

Includes the arms, legs, shoulders, and pelvis.

Ligament

A tough, flexible strand of connective tissue that holds bones together.

Cartilage

Strong, flexible connective tissue found at the end of bones that allows them to move smoothly.

Compact Bone

The hard outer layer of bone, storing minerals such as calcium.

Spongy Bone

Provides strength and support for the bone, with many open spaces.

Marrow (Red and Yellow)

Soft tissue at the center of bones; red marrow makes red and white blood cells, yellow marrow stores fat.

Collagen

A protein in connective tissue that allows bones to have some flexibility.

Growth Plate

Locations where long bones lengthen.

Joint

The area where two bones meet; can be fixed (not moving) or movable (allowing movement).

Ball and Socket Joint

Allows one of the bones to rotate in a large circle, found in the shoulder and hip.

Hinge Joint

Allows bones to move back and forth, found in the elbow and knee.

Gliding Joint

Allows flexibility in the wrist and ankles.