Transportation in Animals and Plants Class 7 Science Notes - Chapter 11

The blood circulating in the body also distributes oxygen and food to different part/ cells of the body. Also, the waste products from various parts of the body are carried to the process of excretion. The human circulatory system comprises of blood vessels (arteries and veins) and heart (pumping organ).

  • Arteries – They transport blood from the heart to all the parts of the body
  • Veins – The blood from all the part of the body is got back to the heart by veins.

The components of blood are White blood cells, Red blood cells, platelets. The red color of the blood is because of the hemoglobin. It is a red pigment which makes the blood appear in red color. The heart rate of an average adult is 70–80 times each minute.

The human excretory system consists of two ureters, two kidneys, urethra, and urinary bladder. The process of removal of waste products from the body is called excretion. The waste products excreted by fish directly dissolve in water.

Few Important Questions

  1. How is the blood from heart transported to all the parts of the body? Explain the process.
  2. Kidneys eliminate waste materials in the form of ___________.
  3. Water in plants is transported through ___________.
  4. What is the name of the network that connects veins and arteries?
  5. Explain how to increase the water absorption through roots?
  6. List the different components of blood.
  7. Explain the function of the heart.
  8. Explain the process of excretion.
  9. __________ cells have Haemoglobin.
  10. Define stomata. Write two functions.

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Practise This Question

In which part of the alimentary canal, does the digestion of carbohydrates and proteins completes?