Mini BH 27 Circulatory/Frog disection

Circulatory System Purpose?

Transport oxygen, nutrients,other substances and remove waste from tissue

Septum

A wall in the heart that separates the right side from the left side

Prevents oxygen-poor and oxygen rich blood from mixing

artium/atria

Upper Chamber

Receive blood from the body

ventricle

Lower chamber

Pumps blood out of the heart

Aorta

Carries oxygen rich blood from left ventricle to body

Superior Vena Cava

Brings oxygen-poor blood from the upper body to the right atrium

Pulmonary Veins

bring oxygen rich blood from both lungs to left atrium

Right atrium

Accepts oxygen poor blood from the body

Left atrium

Accepts oxygen rich blood from the lungs

Inferior Vena cava

bring oxygen poor blood from the lower body to right atrium

Right Ventricle

Accepts oxygen poor blood to the lungs

Left ventricle

Pumps oxygen rich blood to body

Heart functions as two pumps therfore…

one pump pushed blood to lungs while the other pump pushes blood to rest of body

Pulmonary circulation

Carries blood between the heart to the lungs

Systemic circulation

carries blood between the heart and lungs

Right side of heart

Pumps deoxygenated blood from the heart to the lungs

In the lungs carbon dioxide diffuses from the blood and oxygen absorbed back into blood into left side of heart

Left side of heart

pumps oxygenated blood to rest of body

Cells absorb the oxygen that they need to load the blood with carbon dioxide

Blood leaves through aorta through blood vessels

Three types of blood vessels

Arteries, capillaries, and veins

Arteries

Large vessels that carry blood from the heart to tissues of body

All arteries besides pulmonary arteries carry oxygenated blood.

Have thick elastic wall to help aid powerful pressure of heart

Capillaries

smallest blood vessels and narrow that blood cells pass through them

Thin wall allows oxygen and nutrients to diffuse from blood into tissues

Allows carbon dioxide and other waste to move from tissues into blood

Veins

after blood pass through capillaries, returns to heart through veins

Located near and between skeletal muscle

Contain valves which ensure blood flower in one direction to heart