Cardiovascular System

Carry nutrients such as amino acids, glucose, fatty acids and O2 to the tissues. Carry waste from the tissues for disposal

Artery

Heart

Blood

red

blood

white

vessel

Carry blood away from the heart. There are 3 layers. Are white and thicker in appearance

Innermost layer. Lines the lumen and made up of endothelial cells

Middle layer that contains smooth muscle. Usually the thickest layer

Outermost layer. containing elastin and collagen

Elastic (large): Thick walled and near the heart. Muscular (Distributing): Deliver blood to specific organs Arteioles: smallest one

Take blood back to the heart. Have same layers but have little smooth muscle or elastin and are thinner walls. Have one way valves

Venules: like capillaries but largers Veins: Smooth muscle circularly arranged, more collagen

Exchange materials between the blood and the tissues

Continuous: Held together by tight junctions found in most tissues. Fenestrated: has numerous holes that allow for rapid absorption and filtration. found in kidneys and intestines.

Lymph is extracellular fluid that is returned to the heart via the lymphatic system. It is immediately mixed with blood upon returning to the vena cava.

Largest vein in the body divided into superior and inferior vena cava. Transports blood from the body to right atrium

Largest artery. Pumps blood from the heart to the rest of the body

Supplies nutrients and oxygen to the heart muscles

Carries low oxygenated blood to the lungs

Carries oxygenated blood from the lungs to the heart

between the atrium and the ventricles that prevent blood from flowing back into the atrium when the ventricle contracts. Look like strings