Grade 11: Circulatory System

Circulatory System

Transports oxygen, waste, nutrients, hormones, heat, etc... around the body

Platelets

Helps with blood clotting

Plasma

Liquid part of blood

Red blood cells

Blood cells that carry oxygen from the lungs to the body cells.

White blood cells

Blood cells that perform the function of destroying disease-causing microorganisms

Arteries

Blood vessels that carry blood away from the heart to tissues

Vains

carry blood to the heart

Vasolidation

The enlargement of blood vessels to increase blood supply and reduce heat

Vasoconstriction

Reduces blood flow and heat transfer by decreasing the diameter of superficial blood vessels.

Atrium

Received blood returning to the heart

The only oxygenated vain in the body is called what?

Pulmonary vain

Pericarium

Two thin layered fluid filled sac that covers outer surface of the heart.

Ventricle

Lower chamber of the heart that pumps blood out of the heart to the rest of the body

Pulmonary circulation

Circulation of blood between the heart and the lungs

Systemic Circulation

Provides functional blood from the heart to the tissue of the body

Capillaries

Tiny blood vessels that transport blood, nutrients, and oxygen to the cells in organs and body systems

Aorta

Largest artery in the body

Vena cava

2 largest veins in the body

Coronary Circulation

flow of blood to and from the tissues of the heart

Tricuspid valve

between right atrium and right ventricle

Pulmonary Valve

between right ventricle and pulmonary artery

bicuspid valve

between left atrium and left ventricle

Aortic valve

between left ventricle and aorta

Cardiac Cycle

A complete heartbeat consisting of contraction and relaxation of both atria and both ventricles

Diastolic pressure

the pressure in the arteries when the heart is at rest

Systole

contraction phase of the heartbeat

SA Node

pacemaker of the heart by using electrical signals

AV Node

relays electrical impulses from atria into ventricles

Purkinje fibers

specialized conductive fibers located within the walls of the ventricles

Electrocardiogram (ECG)

A recording of the electrical activity of the heart