Question

(10) What
the consequences of a deficiency of haemoglobin in our bodies?
Describe double circulation of blood in human beings. Why is it necessary?
the differences betron th
of materials in xylem and phloem?
ton​

Answer 1

Answer:

here is your answer!

Explanation:

Deficiency of hemoglobin in the human body will result in anaemia. Hemoglobin is present in red blood cells which carry oxygen to cells of the body. A decrease in its amount will result in a decrease in the oxygen-carrying capacity of blood. The person may suffer from breathlessness and fatigue which may be a

symptom of anaemia.

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Mammals have a double circulatory system. This means that during a single cycle, the blood goes twice in the heart. There are two loops in which blood is circulated. One loop is oxygenated and the other is de-oxygenated. This double circulatory system is important because it ensures provision of oxygenated blood to the muscle and not a mixture of oxygenated and de-oxygenated blood. Hence, this system ensures efficient supply of oxygenated blood to the muscles.

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Difference between xylem and phloem transport:

Xylem transport Phloem transport

1. Xylem tissues include tracheids, vessels, fibres and parenchyma and serve in ascent of sap/water and minerals. 1. Phloem tissues is a composed of four elements namely, sieve tube elements, companion cell, phloem fibres and phloem parenchyma and serve in translocation of organic nutrients.

2. Due to defined source and sink relationship, the movement is unidirectional. 2. The movement is multidirectional as source sink relationship keeps changing.

3. Xylem transport is not influenced by metabolic inhibitors. 3. Phloem transport is inhibited by metabolic inhibitors.

4. Xylem vessels and tracheids are main component of transport. 4. Sieve tube are main component of transport which are assisted by companion cells.

5. Major driving forces are transpiration pull and diffusion. 5. Being active transport, it uses ATP.

Answer 2

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Explanation:

1. What is the consequences of a deficiency of haemoglobin in our bodies?

→Haemoglobin is the respiratory pigment that transports oxygen to the body cells for cellular respiration. Therefore, deficiency of haemoglobin in the blood can affect the oxygen supplying capacity of the blood. This can lead to a deficiency of oxygen in the body cells. It can also lead to a disease called anaemia.

2. Describe double circulation of blood in human beings. Why is it necessary?the differences between the materials in xylem and phloem?

→During a single cycle blood goes twice in the heart which is known as double circulation. It is necessary in human being to separate oxygenated and de-oxygenated blood because this makes their circulatory system is more efficient and helps in maintaining constant body temperature.

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