biology unit 1 and 2

what are the veins in the heart

• the aorta

• vena cava

• the pulmonary artery

what is the job of the coronary arteries

• supply the heart muscle tissue with its own blood flow of oxygenated blood.

• supply the heart with blood flow of deoxygenated blood

• taking blood from the heart and taking it too the lungs

• taking the blood fro the heart and taking it too the rest of the body

what is the main function of the red blood cell

• to carry out substances

• to carry oxygen

• to carry glucose

• to carry carbon dioxide

what four things make up blood

• carbon dioxide, red blood cells, platelets, plasma

• white blood cells, red blood cells, plasma and platelets

• plasma, red blood cells, white blood cell, oxygen

• red blood cells, white blood cells, phagocytes and platelets

what vessel does deoxygenated blood enter the heart

• pulmonary artery

• aorta

• pulmonary vein

• vena cava

why does the heart have valves

• to stop the flow of blood to the brain

• to get the blood to the rest of the body

• to stop the backflow of blood

• to get the blood to the brain

what are two characteritics of capillaries make them good at there job

• they are very stretchy and can stretch anything in or out

• they have no large surface area

• they are very thick and can keep themselves protected

• they are one cell thick and have a large surface area

what vessels contains valves

what is a pallisade mesophyll

• closely packed plant cells with many chloroplast for photosynthesis

• provides a water proof layer that prevents water loss

what is the cell membrane composed off?

• protiens and enzymes

• phospolipids and protiens

• enzymes and phospholipids