Chapter 15 - Support, Movement and Locomotion

Humerus

a long bone with a rounded head epiphysis and a long central shaft called endophysis.

Ulna

________ has an extended bone.

Bacteria

________ break down sugars to make acids.

Collar Bone

The bone that prevents the shoulder from bending inward.

Erosion

________ of denting exposes pulp, which makes the tooth painful.

Plaque

Substance hardened to tartar which is not removed by simple brushing.

Tartar

Deposition that roughens the surface of teeth.

Hinge Joint

Joint that functions like the hinge on a door, allowing bones to move in one direction back and forth with limited motion along other planes.

Ulna

________ has cavity where part of humerus fitted to make hinge joint.

Ulna

The bone thicker than radius.

Ulna

________ is longer than radius.

Skull

The most anterior part of the body. It encloses and protects the brain. It also holds and protects the main sense organ.

Backbone

It makes the central axis of the body. It keeps us upright and holds the weight of body. It is made of 33 irregular bones stacked one above the other.

Ribs

Encloses and protects the heart, lungs and major blood vessels. They also move to bring inhalation and exhale.

Antagonistic muscles

Muscles arranged in pairs, when one contracts, the other relaxes