Circulation

Question 1

Red blood cells

Answer 1

Haemoglobin to carry oxygen, no nucleus, disc-shaped, made in bone marrow

Question 2

White blood cells

Answer 2

Fight infection, produce antibodies, no definite shape, less white blood cells then red

Question 3

Platelets

Answer 3

Blood clotting, no nucleus, fragments of cells, less platelets than red blood cells but more than white

Question 4

Plasma

Answer 4

90% water, carries platelets and red white blood cells,Carries dissolved substances(10%)e.g. Glucose proteins,urea.

Question 5

Functions of blood

Answer 5

Transport, defence against disease, clotting

Question 6

Transport in blood

Answer 6

Oxygen,carbon dioxide, glucose

Question 7

3 types of blood vessels

Answer 7

Arteries, veins, capillaries

Question 8

Arteries

Answer 8

Carry blood away from the heart

Question 9

Veins

Answer 9

Carry blood back to the heart

Question 10

Capillaries

Answer 10

Connect arteries and veins

Question 11

Cardiac muscle

Answer 11

It doesn’t fatigue or tire

Question 12

Four chambers in the heart

Answer 12

Right and left atria and the right and left ventricles

Question 13

Left ventricle has a thicker wall because

Answer 13

It has to pump more blood around the body.

Question 14

Normal body temperature

Answer 14

37 degrees

Question 15

Resting pulse rate

Answer 15

70 beats per minute

Question 16

Heart disease is prevented by

Answer 16

Exercise

Question 17

Exercise is good because

Answer 17

Strengthens our lungs,
Strengthens our hearts,
Strengthens our other muscles,
Reduces weight

Question 18

The effect of exercise on the heart rate is

Answer 18

It makes it faster

Question 19

Circulatory system

Answer 19

Are blood vessels, heart and blood