Question

Long answer type questions:
1. Why is transportation of substances necessary in living organisms?
2. Explain the working of heart with the help of a diagram.
3. Draw a neat and labelled diagram of excretory system and explain its various organs.
4. How does skin helps in excreting out waste from our body?
5. Describe excretion in plants.​

Answer 1

Explanation:

Kidneys are the main organ of the human excretory system. Also, every individual has a pair of kidneys. They are located one on each side of the spine at the level of the liver. Kidneys are divided into three regions. Namely, the renal cortex which is the outer layer. Next, the renal medulla which is the inner layer. And lastly, the renal pelvis which carries the urine from the kidney to the ureter.

Answer 2

hey dude meet your answer :

1.). Transport in organisms (plants and animals) is necessary as it absorbs all essential substances and transports them to all parts so that they reach each and every cell of the body. ... The water containing minerals called cell sap is carried by the xylem vessels to all the parts of the body.

2.) The heart pumps blood through the network of arteries and veins called the cardiovascular system. The heart has four chambers: ... The left atrium receives oxygenated blood from the lungs and pumps it to the left ventricle. The left ventricle (the strongest chamber) pumps oxygen-rich blood to the rest of the body.

4.)

The skin plays a role in excretion through the production of sweat by sweat glands. Sweating eliminates excess water and salts, as well as a small amount of urea, a byproduct of protein catabolism. ... The large intestine also collects and excretes wastes from throughout the body, including bilirubin in bile.

5.)Excretion is the removal of waste from the body. Plants also produce waste products but very slowly and in very small amounts. They do not have any special organ for the removal of their waste product. The waste products of a plant are carbon dioxide, water vapour and oxygen.

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