Question

1.
Give reasons for the following:
(a) Arteries have thick and elastic muscular walls.
(b) Arteries are not easily seen.
(c) Veins have thin and less elastic muscular walls.
2. How does transpiration help in the transport of water and minerals in plants?​

Answer 1

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❤ᴀɴsᴡᴇʀ❤

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1. Arteries have have thick and elastic mascular walls because arteries are the first vessel that the heart pumps blood through, they experience the highest blood pressure.
2. Arteries are not easily seen because arteries are thick, present inside the skin as compated to vein, arteries are yellow in color.
3. The walls of veins have the same three layers as the arteries. Although all the layers are present, there is less smooth muscle and connective tissues. This makes the walls of veins thinner than those of arteries, which is related to the fakt that blood in the veins has less pressure than in the arteries.
4. Transpiration helps in the upward transport of substances in plants by drawing eater up from the roots. During transpiration, water evaporates through pores in the leaves called stomata. This creates a negative pressure in the leave that helps to move water up from the roots through the xylem.

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ʜᴏᴘᴇ ɪᴛ ʜᴇʟᴘs ʏᴏᴜ................

Ғᴏʟʟᴏᴡ ᴍᴇ..................