The Circulatory System

Question 1

Blood

Answer 1

Plasma, blood cells

Question 2

Red blood cells

Answer 2

Has haemoglobin to carry oxygen, no nucleus, disc-shaped, made in the bone marrow

Question 3

Haemoglobin

Answer 3

Carries oxygen

Question 4

White blood cells

Answer 4

Fight infection, produce antibodies, nucleus present, no definite shape

Question 5

Platelets

Answer 5

Blood clotting, no nucleus, fragments of cells,

Question 6

Plasma

Answer 6

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

Question 7

Functions of blood

Answer 7

Transport, defence against disease, clotting

Question 8

Valves

Answer 8

To stop back flow of blood

Question 9

Cardiac muscle

Answer 9

It doesn’t fatigue or tire

Question 10

The heart

Answer 10

Is a pump, located slighted to the left hand side of your chest

Question 11

The average rate of an adult heartbeat

Answer 11

70 beats per minute

Question 12

Blood to the heart

Answer 12

Arteries bring blood away, veins bring blood to the heart

Question 13

Why exercise

Answer 13

1. Strengthens our lungs
2. Strengthens our hearts
3. Strengthens our other muscles
4. Reduces weight

Question 14

Heart disease

Answer 14

Small arteries on the way to heart become clogged with fat.

Reduce the risk of heart disease:

1. Exercise regularly
2. Eat a healthy diet ( less fat and salt )
3. Don’t smoke

Question 15

Blood vessels

Answer 15

Arteries, veins, capillaries