NCERT solutions for class 7 science chapter 11 transportation in animals and plants: In this chapter, you will study that in most animals, the blood that circulates in the body distributes food and oxygen simultaneously to different cells of the body and also carries waste products from different parts of the body to other for excretion. In the solutions for NCERT class 7 science chapter 11 transportation in animals and plants, you will get questions based on the transportation of energy and food from one part to another inside the body of plants and animals. In this chapter, you will study the circulatory system which consists of the heart and blood vessels including other parts. It's important to know that in humans, blood flows through arteries, as well as veins and the heart. You know why our blood is red, it is due to the presence of a red pigment inside the blood that is hemoglobin. In NCERT solutions for class 7 science chapter 11 transportation in animals and plants, you will also get questions related to the heartbeat, heart and its functioning. If you need help in finding solutions of NCERT book to any other class, then don't worry NCERT solutions will help you out.
Here are the important topics of CBSE NCERT solutions for class 7 science chapter 11 transportation in animals and plants mentioned below:
11.1 Circulatory System
11.2 Excretion in Animals
Excretory System in Humans
11.3 Transport of Substances in Plants
Transport of Water and Minerals
In this chapter, you will study an interesting thing that fish excrete waste substances such as ammonia which directly dissolve in water and birds, insects and lizard excrete uric acid in semi-solid form. Now if we talk about plants, then nutrients are transported along with water to the entire plant via the vascular tissue which is called xylem. After going through the solutions for NCERT class 7 science chapter 11 transportation in animals and plants, you must be able to understand all the answers the following questions:
NCERT solutions for class 7 science chapter 11 transportation in animals and plants: Solved Exercise Questions:
Q1. Match structures given in Column I with functions given in Column II.
Column I Column II
(i) Stomata (a) Absorption of water
(ii) Xylem (b) Transpiration
(iii) Root hairs (c) Transport of food
(iv) Phloem (d) Transport of water
(e) Synthesis of carbohydrates
The matched structures of column I with functions of column II is given below:
(d) Transport of water
(iii) Root hairs
(a) Absorption of water
(c) Transport of food
Q2. Fill in the blanks.
(i) The blood from the heart is transported to all parts of the body by the ___________ .
(ii) Haemoglobin is present in ___________ cells.
(iii) Arteries and veins are joined by a network of _______________ .
(iv) The rhythmic expansion and contraction of the heart is called _________.
(v) The main excretory product in human beings is ___________ .
(vi) Sweat contains water and ____________ .
(vii) Kidneys eliminate the waste materials in the liquid form called __________.
(viii) Water reaches great heights in the trees because of suction pull caused by _________ .
(i) The blood from the heart is transported to all parts of the body by the arteries.
(ii) Haemoglobin is present in red blood cells.
(iii) Arteries and veins are joined by a network of capillaries.
(iv) The rhythmic expansion and contraction of the heart is called heartbeat.
(v) The main excretory product in human beings is urea .
(vi) Sweat contains water and salt .
(vii) Kidneys eliminate the waste materials in the liquid form called urine.
(viii) Water reaches great heights in the trees because of suction pull caused by transpiration
Q5. What will happen if there are no platelets in the blood?
Blood platelets help to clot the blood. When there is some injury occurs blood starts flowing and if there are no platelets,
the blood will not be able to clot and keep on flowing. Therefore can cause death because of the huge loss of blood.
Q6. What are stomata? Give two functions of stomata.
There are small openings or pores on the lower surface of the leaves called stomata these opening are surrounded with guard cells.
The two functions of stomata are:
(i) Transpiration is possible through stomata, i.e., excess water loss from the plant.
(ii) Absorption of water from the roots, when there is loss of water from the stomata creates an upward pull.
(iii) Exchange of gases.
Q7. Does transpiration serve any useful function in the plants? Explain.
Transpiration helps in many ways:
(i) To enhance the absorption of water and dissolved minerals by the creation of a suction pull.
(ii) It helps in the loss of excess water from the plant.
(iii) Photosynthesis is possible because of the transportation of water and minerals to the leaves.
Q8. What are the components of blood?
There are four components of blood:
(i) Platelets: It helps in the formation of blood clots thus preventing the excessive bleeding from the wounds.
(ii) Plasma: They are present in the blood cells and also contains dissolved nutrients.
(iii) Red blood cells (RBC): They are the most abundant cells in the blood. RBC contains a red pigment called hemoglobin which carries oxygen and transports it to all the parts of the body.
(iv) White blood cells (WBC): They help the body to fight against the diseases by changing their shapes. Thus, they constitute the immune system of the body.
Q9. Why is blood needed by all the parts of a body?
Blood is needed by all parts of the body because it is an important part of the transport system of our body and performs the following these important functions:
(i) Transports oxygen from the lungs to all the body cells.
(ii) Carries carbon-dioxide, waste products back to the lungs so that it can be exhaled easily.
(iii) Blood fights against diseases and infections.
Q10. What makes the blood look red?
Blood looks red because of the presence of haemoglobin, a red pigment in the red blood cells or RBC's that makes blood appear red in colour.
The haemoglobin carries oxygen and transports it to all the parts of the body.
Q11. Describe the function of the heart.
The human heart is divided into four chambers where the upper two chambers are called right and left atrium and the lower chambers are called the right and left ventricles, therefore the functions of the heart are as follows:
(i) The right atrium receives carbon dioxide-rich blood from the body. Blood from the right atrium enters the right ventricle, which contracts and pumps the blood to the lungs.
(iii) Oxygen-rich blood from the lungs returns to the left atrium, then blood enters the left ventricle which contracts and pumps the blood to all parts of the body.
Hence basic function is to beat with rhythmic contraction and expansion throughout the life and transport the blood as a pump.
Q12. Why is it necessary to excrete waste products?
The waste produced by our cells are toxic and therefore need to be excreted out. The process of removal of waste products produced in the cells of living organisms is called excretion.
If you are facing any issue in understanding the answers of the above questions, then don't worry and again go through that NCERT Book and try to understand all the concepts of every topic and then write the answers of all these questions by your own and then compare them with CBSE NCERT solutions for class 7 science chapter 11 transportation in animals and plants. You will see that your knowledge, as well as the understanding of these concepts, will increase and you will be able to explain the answers in a better way.
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