Science Key Terms Section 2

Front 1

Skeleton

Back 1

is your framework and is made up of all the bones in your body. It determines the shape of your body.

Front 2

Vertebrae

Back 2

26 small bones that make up your backbone.

Front 3

Joint

Back 3

is a place in the body where two bones come together. Joints allow bones to move in different ways. There are two kinds of joints—immovable joints and movable joints.

Front 4

Movable joints

Back 4

different kinds of joints that allow your body to move in a variety of ways.

Front 5

Ligament

Back 5

strong connective tissues that hold together the bones in movable joints.

Front 6

Cartilage

Back 6

connective tissue, which is more flexible than bone. It covers the ends of the bones and keeps them from rubbing against each other.

Front 7

Compact bone

Back 7

is a layer beneath the bone’s outer membrane, which is hard and dense, but not solid.

Front 8

Spongy bone

Back 8

a layer just inside the compact bone that has many spaces within it.

Front 9

Marrow

Back 9

a soft, connective tissue contained in the spaces in many bones. There are two types, red and yellow.

Front 10

Osteoporosis

Back 10

a condition in which the body’s bones become weak and break easily.