heart, blood and circulation.

Question 1

what is meant by a double circulatory system?

Answer 1

1 circuit pumping blood to the lungs.
1 circuit pumping oxygenated blood around the body.

Question 2

define valves.

Answer 2

prevent backward flow of blood between the atrium and ventricles.

Question 3

on the left side going down what are the different parts of the heart called?

Answer 3

aorta.
pulmonary artery.
pulmonary vein.
left atrium.
aortic valve.
mirral valve.
left ventricle.

Question 4

on the right side going up what are the different parts of the heart called?

Answer 4

inferior vena cava.
right ventricle.
pulmonary valve.
tricuspid valve.
right atrium.
superior vena cava.

Question 5

in how many stages does the blood get pumped through he heart?

Answer 5

6.

Question 6

what is the first step of blood pumping through the heart does?

Answer 6

deoxygenated blood goes into the R.atrium via the vena cava.

Question 7

what is the second step of blood pumping through the heart does?

Answer 7

blood then goes into the R.ventricle.

Question 8

what is the third step of blood pumping through the heart does?

Answer 8

R.ventricle pumps blood out of the heart to the lungs.

Question 9

what is the fourth step of blood pumping through the heart does?

Answer 9

oxygenated blood from lungs goes into the L.atrium via pulmonary vein.

Question 10

what is the fifth step of blood pumping through the heart does?

Answer 10

goes into L.ventricle.

Question 11

what is the sixth step of blood pumping through the heart does?

Answer 11

L.ventricle pumps blood out of heart to flow around the body.

Question 12

what is the function of the blood component: white blood cell?

Answer 12

fights off viruses and infection.
creates antibodies.

Question 13

what is the function of the blood component: red blood cell?

Answer 13

clots blood.
forms scabs.

Question 14

what is the function of the blood component: plasma?

Answer 14

liquid part of blood.
carries nutrients.

Question 15

what does oxygen + haemoglobin turn into?

Answer 15

oxyhaemoglobin.

Question 16

what are the adaptations of the red blood cell?

Answer 16

small size- squeeze through capillaries.
no nucleus- more space for haemoglobin to carry oxygen.
haemoglobin- protein which binds to oxygen.
biconcave disc shape- large surface area to carry max amounts of oxygen.

Question 17

what percent of your blood is made out of red blood cells?

Answer 17

36-57%.

Question 18

what percent of your blood is made out of white blood cells and platelets?

Answer 18

1-2%.

Question 19

what percent of your blood is made out of plasma?

Answer 19

46-63%.

Question 20

when blood is in a test tube what component is where?

Answer 20

top: plasma.
white blood cells and platelets.
bottom: red blood cells.

Question 21

how does the blood vessel: the artery look in a cross section?

Answer 21

small lumen in the middle inside.
thin elastic wall on the outside.

Question 22

how does the blood vessel: vein look in a cross section?

Answer 22

large lumen valve in the middle inside.
thin wall on the outside.

Question 23

how does the blood vessel: capillary look in a cross section?

Answer 23

single cell wall.