The skeleton, circulatory, and muscular systems

Term Definition
Joints The place where two or more bones meet.
Ball and Socket Joint The ball shaped head of one bone moves inside the cup shaped socket of the other. The joint can move in all directions.
Hinge Joint This joint moves only moves in one direction, like a door hinge.
Gliding Joint One part of a bone glides over another bone allowing a small range of sideways movement.
Pivot Joint The end of one bone rotates inside a ring formed by another. The joint can move up and down and from side to side.
Tendons – Joins muscles to bones and muscles to muscles
Ligaments – Connects bones to other bones at the joints
Cartilage – Strong, flexible tissue that allows joints to move easily, cushions bones, and supports soft tissue.
Skeletal Muscles – Attached to bones (voluntary)
Smooth Muscles – In walls of organs such as stomach, intestines, and bladder (involuntary)
Cardiac – In the heart (involuntary)
The 3 Main part of the Circulatory System are… 1. The Heart
2. The Blood Vessels
3. Blood
Arteries – Carry blood away from the heart
Aorta – The main artery in the body
Veins – Carry blood to the heart
Capillaries – Carry the blood to all the body cells and connect arteries to veins
Atherosclerosis – Occurs when fatty substances build up on the inner lining of the arteries

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