Heart

Question 1

Pulmonary arteries

Answer 1

Carry deoxygenated blood to the lungs.

Question 2

Semilnuar Valves

Answer 2

Prevent blood running back into the ventricles when pressure falls during relaxation

Question 3

Vena Cava

Answer 3

the main vein of the body; returns deoxygenated blood from the head and lower body to the right atrium

Question 4

right atrium

Answer 4

receives deoxygenated blood from the vena cava . The pacemaker is found in the wall of the right atrium

Question 5

tricuspid valve

Answer 5

prevent blood flowing back frim ventricle to atrium during contraction

Question 6

Carotid artery

Answer 6

Carries oxygenated blood to the head, particularly to the brain

Question 7

Pulmonary vein

Answer 7

Vessel that carries oxygenated blood. It has the highest oxygen and lowest carbon dioxide concentration in the circulation

Question 8

Aorta

Answer 8

The main artery of the body supplies oxygenated blood at high pressure , to the organs at high pressure , to the organs and tissues of the body

Question 9

Hepatic artery

Answer 9

Carries oxygenated blood to liver

Question 10

Renal artery

Answer 10

Carries blood containing variable amounts of the absorbed products of digestion from the digestive system of digestion

Question 11

Capillaries

Answer 11

Link arteries and veins
Prevent in all organs and tissues and are the site of exchange of materials between blood and tissue fluid
One cell thick

Question 12

Why small organisms have different system as large organisms such as humans

Answer 12

Large complex organisms, such as humans have a small surface are in relation to their relatively large volume