Stomata - Transpiration; Xylem - Transport of water; Root hairs - Absorption of water; Phloem - Transport of food.
(i) arteries
(ii) red blood
(iii) capillaries
(iv) heartbeat
(v) urea
(vi) salts
(vii) urine
(viii) transpiration
- a. xylem / phloem / stomata / root hair
- b. shade / dim light / under the fan / covered with polythene bag
Xylem transports water in plants. Moving air under a fan increases transpiration, which increases the suction pull and water absorption by roots.
(a) (i) xylem
(b) (iii) under the fan
Transport is necessary because cells need food, water and oxygen, and wastes must be removed. In animals, blood carries oxygen, digested food and wastes. In plants, xylem carries water and minerals, while phloem carries food prepared in leaves.
Blood will not clot properly if there are no platelets. Even a small injury may keep bleeding for a long time, causing serious blood loss.
Stomata are tiny pores mostly present on the surface of leaves. Their functions are exchange of gases such as carbon dioxide and oxygen, and loss of water vapour through transpiration.
Yes. Transpiration creates a suction pull that helps draw water and minerals upward from roots to leaves. It also helps cool the plant.
Blood is made of plasma, red blood cells, white blood cells and platelets.
Blood carries oxygen and digested food to all body parts. It also carries waste materials to organs that remove them. Therefore every part of the body needs blood supply.
Blood looks red because red blood cells contain the red pigment haemoglobin.
The heart is a muscular organ that pumps blood throughout the body. The right side receives blood rich in carbon dioxide and sends it to the lungs. The left side receives oxygen-rich blood from the lungs and pumps it to all parts of the body. Rhythmic contraction and relaxation of the heart keeps blood circulating continuously.
Waste products formed in the body can be harmful if they accumulate. Excretion removes these wastes and helps keep the internal environment of the body healthy.