CBSE Class 7 Science Transportation In Animals And Plants Worksheet

 

4- Choose Correct Option:

 

(i) Blood cells responsible for clotting are:

(a) Plasma

(b) WBC’s

(c) RBC’s

(d) Platelets
Ans.(d) Platelets

 

(ii) The lower chambers of the heart are called:

(a) Atria

(b) Valves

(c) Veins

(d) Ventricles
Ans.(d) Ventricles

 

(iii) The excretory system consists of:

(a) Kidney

(b) Bladder

(c) Urethra

(d) All of these
Ans.(d) All of these

 

(iv) The muscular organ which beats continuously to act as a pump:

(a) Auricles

(b) kidney

(c) Heart 

(d) Veins
Ans.(c) Heart

 

(v) Blood contains:

(a) Plasma

(b) WBC’s

(c) RBC’s

(d) All of these
Ans.(d) All of these

 

 

5- Very Short Answer Type Questions:

 

(i) Why is blood red in colour?

Answer- Due to haemoglobin.

 

(ii) Define translocation.

Answer- Transportation of food material from leaves to other parts of the plant is called translocation.

 

(iii) What is dialysis?

Answer- The process of removing waste products and excess fluids from the blood with the help of a machine is called dialysis.

 

 

6- Short Answer Type Questions:

 

(i) State three functions of blood.

Answer-

(1) It helps in the transport of oxygen and nutrients.

(2) It helps to excrete wastage.

(3) It helps to maintain body temperature constant.

 

(ii) Name the excretory organs in humans.

Answer- Two Kidneys, two Ureters, Urinary bladder and Urethra.

 

(iii) Why do veins have valves?

Answer- Valves allows blood to flow only towards the heart and prevent blood from flowing back.

 

 

7- Long Answer Type Questions:

 

(i) Write and explain the components of blood.

Answer-

(1) Red Blood Cells (RBC’s)- These are disc shaped cells which are red in colour. RBC’s contain haemoglobin which helps in transportation of oxygen and carbon dioxide.

(2) White Blood Cells (WBC’s)- These are colourless and irregular in shape. They fight against germs.

(3) Platelets- These are the smallest cells in the blood. They help in clotting of blood during injuries.

(4) Plasma- It is the liquid part of blood which is yellowish in colour. Its major component is water.

 

(ii) Describe the functions of heart.

Answer- Heart pumps the blood in the body. Heart receives oxygen-rich blood from the lungs in the left auricle. Then the left auricle contracts and blood enters left ventricle. When the left ventricle contracts,the blood is pumped out to the body.

Deoxygenated blood from the body comes to the right auricle. Then the right auricle contracts and blood enters right ventricle. Right ventricle pumps blood to the lungs through pulmonary arteries for the exchange of gases. Heart has valves which prevent blood from flowing back.

 

(iii) Draw a labeled diagram of excretory system.

Answer

(iv) Differentiate between arteries and veins.

Answer-

 

(v) Explain the transportation of substances in plants.

Answer-

(1) Transportation of water and minerals- Transpiration creates a suction pressure, as a result of which water is forced into the xylem cells of the roots. Then there is a steady movement of water from the root xylem to all the plant parts through the interconnected water - conducting channels.

(2) Transportation of food- Phloem transports food materials from the leaves to different parts of the plant body by utilizing energy. This is helpful in moving materials according to the needs of the plant.

(3) Osmosis- Root hairs of plant uptake water from soil via osmosis.

More question- 

Q1. Tick the correct option:

1. Body system involved in transporting substances:
a) Excretory
b) Circulatory
c) Digestive
d) Respiratory

2. Fluid part of the blood:
a) RBCs
b) WBCs
c) Haemoglobin
d) Plasma

3. Circulatory Fluid is absent in :
a) Hydra
b) Earthworms
c) Ants
d) Both (a) and (c)

4. Tube like structures in excretory System:
a) Ureters
b) Urethra
c) Urinary Bladder
d) None of these

5. Excretory product in humans:
a) Uric Acid
B) Ammonia
c) Urea
d) Water

6. Which type of cells contain haemoglobin ?
a) Red Blood Cells
b) White Blood Cells
c) None of the two above
d) Platelets

7. Which type of cells protect our body from germs ?
A) RBCs
B) WBCs
C) Platelets
D) None of the above

8. The clot is formed due to the presence of which type of cells ?
A) Platelets
B) RBCs
C) WBCs
D) None of the above

9. A normal person usually have a pulse rate between ?
a) 50-55
b) 50-60
c) 62-70
d) 72-80

10. How many chambers are there in the human heart ?
a) 3
b) 4
c) 2
d) 5

11. Pulmonary vein carries oxygen-rich blood ?
a) True
b) False
c) Veins cannot carry oxygen-rich blood
d) None of the above

12. In Plants water is transported through
a) Phloem
b) Xylem
c) Stomata
d) Root hairs

13. Plants absorb water through
a) Phloem
b) Xylem
c) Stomata
d) Root hairs

Q2. Fill Ups:

1. __________ and _______ are the two types of blood vessels.

2. The doctor feels the heartbeats with the help of _________________ .

3. Aquatic animals excrete waste in the form of ________________ .

4. ________________ binds with oxygen and help in its transportation.

5. Pulse can be felt in ____________ and ____________ parts of the body.

6. In tissues arteries divide into thin tubes called ________________.

7. __________ side of the heart has oxygen rich blood and _________ side had carbon dioxide rich blood.

8. Excretion is the removal of metabolic waste products called _________________.

9. The heart is made up of special type of muscles, called ____________________.

10. __________________ are thinnest blood vessel.

11. Except the ________________ veins all other veins carry deoxygenated blood.

12. Kidneys eliminate the waste materials in the liquid form called _____________.

13. Water reaches great heights in the trees because of suction pull caused by____________________.

14._________________ is the instrument to amplify the sound of the heart.

Q3. Define:
i. Pulse Rate iv. Heartbeat
ii. Excretion v. Vascular Tissues
iii. Transpiration vi. Tissue

Q4. Give functions of the following:
A. Urinary Bladder
B. Root Hair
C. Phloem

Q5. Differentiate between:
1. arteries and veins
3. Xylem and phloem
2. atrium and ventricle
4. RBC and WBC

Q6. Name the different types of cells present in blood along with their functions?

Q7. What is removed along with water as sweat?

Q8. Give the structure and function of human heart?

Q9. Why is transport of materials necessary in a plant or in an animal?

Q10. How does transportation of substances occur in plants? Explain in detail.

Q11. What is the composition of human urine?

Q12. How does pulse occur?

Q13. Which parts of the body comprise circulatory system?

Q14. Why is it necessary to excrete waste products?

Q15. How does heart avoid mixing of blood?

Q16. Radhey’ s grandmother’s kidneys are not working properly. She requires regular dialysis.
Radhey is taking his grandmother regularly to hospital for dialysis.
(1) What is dialysis?
(2) List different parts of human excretory system.
(3) What moral values are shown by Radhey over here?

Q17. Sumit saw a road accident and immediately took the victim to the nearby hospital. Doctors gave a blood transfusion to the victim.
(1) Critically comment upon Sumit’s attitude.
(2) After sometime Sumit found that at the place of minor cuts and injuries a small clot has formed on victim’s body. What is the reason behind formation of a clot?

FILL IN THE BLANKS

1. The fluid part of blood is called ______________.

2. Blood is red in colour due to the presence of a pigment called _________.

3. The ___________ cells in our body fight against germs.

4. ___________ help in clotting of blood.

5. The number of heart beats per minute is called _______________.

6. The waste dissolved in water is removed as ______________.

7. The filtering of blood through an artificial kidney is called _____________.

8. Salts and urea is removed along with water as ______________.

9. _________________ carry blood from the heart to all parts of the body.

10. ________________ carry blood from all parts of the body to the heart.

11. ___________________ is the instrument to amplify the sound of the heart.

NAME THE FOLLOWING:

1. The organ which pumps blood.

2. The chambers of heart.

3. The scientist who discovered blood circulation.

4. The parts of excretory system.

5. A group of cells that perform a particular function.

6. The vein which carries oxygen rich blood to the heart.

7. The artery which carries carbon dioxide rich blood away from the heart.

8. The vascular tissues in plants.

CHOOSE THE CORRECT ANSWER:

1. Pulmonary (vein / artery ) carry pure blood.

2. (Ammonia / urea ) is the excretory waste in fishes.

3. Phloem helps in the transport of (food / water)in plants.

4. Birds excrete (urea / uric acid).

5. (Right / Left )side of the heart carries oxygen rich blood.

6. Blood is a (solid/liquid ) tissue.

7. (William Harvey / William Beaumont) discovered the circulation of blood in humans.

8. (Photosynthesis /Transpiration) is the process responsible for suction pull in plants.

WRITE TRUE OR FALSE:

1. WBC transports oxygen.

2. Pulse rate indicate the rate of heart beat.

3. Pure blood is circulated through the left part of heart.

4. Xylem helps in the transport of food in plants.

5. Hydra and sponges posses blood circulatory system.

6. Human urine consists of 95% water, 2.5% urea and 2.5% other waste products.

DEFINE : 1. Excretion

DISTINGUISH : 1. Arteries and veins 2. Xylem and Phloem

DIAGRAMS:

1. Schematic human blood circulatory system

2. Human excretory system

Question. If the cut end of a tree is put in eosin solution
(A) Leaves remain fresh but ascent of sap stops
(B) Phloem gets coloured because of ascent of sap
(C) Xylem elements get stained showing ascent of sap through them
(D) Ascent of sap stops

Answer: C

Question. Rate of transpiration in a dorsiventral leaf is
(A) Greater at the upper surface
(B) Greater at the lower surface
(C) Equal at both the surfaces
(D) None of the above

Answer: B

Question. The principal pathways by which water is translocated in angiosperms is :
(A) Xylem vessel system
(B) Xylem and phloem
(C) Sieve tubes members of phloem
(D) Sieve cells of phloem

Answer: A

Question. Which of the following is not a function of transpiration?
(A) Excretion of minerals
(B) Cooling of leaves
(C) Uptake of water
(D) Uptake of minerals

Answer: A

Question. The carbohydrate synthesized in the leaves are transported through sieve tubes most commonly in the form of
(A) Glucose
(B) Triose
(C) Sucrose
(D) Soluble starch

Answer: C

Question. Which of the following contributes most to transport of water from the ground to the leaves of a tall tree?
(A) Breakdown of ATP
(B) Cohesion of water and transpiration pull
(C) Root pressure
(D) Capillary rise of water in xylem

Answer: B

Question. Water will be absorbed by root hair when :
(A) Concentration of solutes in the cell sap is high
(B) Plant is rapidly respiring
(C) They are separated from soil by permeable membrane
(D) Concentration of salts in the soil is high

Answer: A

Question. Which one of the following is connected with transport of water in plants?
(A) Phloem
(B) Xylem
(C) Epidermis
(D) Cambium

Answer: B

Question. The transpiration in plants will be lowest
(A) When there is high humidity in the atmosphere
(B) There is excess of water in the cell
(C) Environmental conditions are very dry
(D) High wind velocity

Answer: A

Question. Due to low atmospheric pressure the rate of transpiration will
(A) Increase
(B) Decrease slowly
(C) Decrease rapidly
(D) Remain unaffected

Answer: A

VERY SHORT ANSWER TYPE QUESTIONS

Q1. Why is color of blood red?

Q2. What does blood consist of?

Q3. What is removed along with water as sweat?

Q4. What is absorbed by roots from the soil

Q5. By which vascular tissue, water and nutrients are transported in the plants?

Q6. What is the function of stethoscope?

Q7. What is pulse?

Q8. How does pulse occur?

Q9. Which parts of the body comprise circulatory system?

Q10. Write the names of upper and lower chambers of heart.

Q11. Which pigment is necessary to provide efficiently to all the cells of the body?

Q12. What is the major excretory product in humans?

SHORT ANSWER TYPE QUESTIONS

Q1. Why is transport of materials necessary in a plant or in an animal?

Q2. What are the functions of white blood cells?

Q3. How is clot formed?

Q4.What is the main function of heart?

Q5. What re the functions of arteries and veins?

Q6. What will happen if there are no platelets in the blood?

Q7. Why is it necessary to excrete waste products?

Q8. What is transpiration? How is it useful to plants?

Q9. What is the function of sweat?

Q10. What is meant by excretion?

Q11. Why is blood needed by all the parts of the body?

Q12. Why do plants absorb a large quantity of water from the soil?

Q13. Differentiate between:

1. arteries and veins

2. atrium and ventricle

3. RBC and WBC

4. xylem and phloem

Q14. Why do sponges and hydra not have blood?

Q15. How does heart avoid mixing of blood?

Q16. Why valves present in veins?

Q17. Why do arteries have thick walls?

Q18. Why do veins have thinner walls?

LONG ANSWER TYPE QUESTIONS

Q1. Describe the function of heart.

Q2. Draw the diagram of human heart and label all the parts.

Q3. Explain the process of excretion in humans.

Q4. Enlist the functions of blood.

Q5. Explain the process of transportation in plants.

Q6. Describe the circulation of blood through heart and body.

Q7. Name the types of blood vessels and their functions.

Q8. Draw a well labeled diagram of human excretory system and discuss the functions of all the parts.