B4

Question 1

Red Blood Cells

Answer 1

Pick up oxygen from the air in your lungs and carry it to the cells where it is needed.

Question 2

White blood cells

Answer 2

Form antibodies against microorganisms

Question 3

Platelets

Answer 3

Help the blood clot at the site of a wound

Question 4

Plasma

Answer 4

An ionised gad which sufficient energy is provided to free electrons from atoms or molecules and to allow both species of ions and electrons to coexist.

Question 5

Arteries

Answer 5

Carry blood away from your heart to the organs of your body

Question 6

Veins

Answer 6

Carry blood away from the organs towards your heart.

Question 7

Capillaries

Answer 7

Enable substances (oxygen and glucose) to diffuse easily out of your blood into cells.

Question 8

Heart

Answer 8

Is an organ that pumps blood around a body

Question 9

Heart Valves

Answer 9

Keep the blood flowing in the right direction

Question 10

Stents

Answer 10

Can be used to keep narrowed or blocked arteries open.

Question 11

Statins

Answer 11

Reduce cholesterol levels in the blood, reducing the risk of coronary heart disease.

Question 12

Phloem-moving food

Answer 12

phloem tissue transports the sugars made by photosynthesis from the leaves to the rest of the plant.

Question 13

Xylem- moving water and mineral ions

Answer 13

Carries water and mineral ions form the soil around the plant to the stem and the leaves.

Question 14

Guard Cells

Answer 14

Are cells surrounding the stoma. They help regulate the rate of transpiration by opening and closing the stoma.

Question 15

Stomata

Answer 15

Open and close to allow the intake of carbon dioxide and the release of oxygen.

Question 16

Bronchi

Answer 16

Are extensions of the windpipe that shuttle air to and from the lungs.

Question 17

Tranchea

Answer 17

The trachea serves as a passageway to allow passage of air from the region of the voice box to the main respiratory channels (bronchi) which enter the lungs.

Question 18

Alveoli

Answer 18

Gas exchange of oxygen and carbon dioxide takes place in the alveoli

Question 19

Right atrium

Answer 19

has thin walls

Question 20

artery

Answer 20

Carries blood to the lungs

Question 21

Aorta

Answer 21

Carries blood around the body

Question 22

Valve

Answer 22

Stops blood going back to the atrium.

Question 23

Left ventricle

Answer 23

has very thick walls; pumps blood to the

body except the lungs.

Question 24

Right ventricle

Answer 24

has thick walls; it pumps blood to the lungs

Question 25

Capillary Network

Answer 25

As arteries branch and divide into arterioles and continue to reduce in size as they reach the muscle they become capillaries.

Question 26

Epidermal tissue

Answer 26

Serving as a plant’s skin, epidermis cells protect internal tissues from the outside world by creating a barrier

Question 27

Xylem and Phloem

Answer 27

Xylem transports water and solutes from the roots to the leaves, phloem transports food from the leaves to the rest of the plant

Question 28

Palisade Mesophyll

Answer 28

Palisade mesophyll cells are tall and closely packed to absorb maximum light

Question 29

Spongy Mesophyll

Answer 29

The lower layer of the ground tissue of a leaf, characteristically containing irregularly shaped cells with relatively few chloroplasts and large intercellular spaces.

Question 30

Meristem Tissue

Answer 30

Meristematic cells give rise to various organs of the plant and keep the plant growing.