The heart and its parts

Blood Vessels Artery – a blood vessel that moves blood away from the heart Vein – a blood vessel that moves blood towards the heart

Chambers Heart has 4 chambers 2 atria – top 2 ventricles - bottom

Blood flows into right Atrium (“space”) –under low pressure –Comes from veins Blood moves through the Tricuspid valve Blood then flows to right ventricle

After right ventricle its then pumped to lungs through pulmonary artery

Goes to lungs then returns to heart through pulmonary vein Goes to left atrium

Goes through mitral valve to left ventricle then returns to body through aorta

Ventricles: much thicker than atriums Left thicker than right Why? Bigger muscle to force the blood thru whole body

Vessels of the heart Superior vena cava (vein): draining from head and neck.

Inferior vena cava: below heart  brings deoxygenated blood from rest of body

Pulmonary truck (artery): takes blood from heart to lungs Has two branches –Why? because you have 2 lungs

Pulmonary arteries: takes deoxygenated blood from heart to lungs. Only artery in body that carries deox. blood.

Pulmonary veins: takes oxygenated blood from lungs to heart. Only vein in body that carries Ox. blood. Empties into Left atrium

Aorta: carries blood from left ventricle to all of body