Question

Frogs and earthworms breathe through their skin because of which the skin of both the organisms is
1. dry and rough
2. dry and slimy
3. moist and rough
4. moist and slimy

Answer 1

Correct Answer - Option 4 : moist and slimy

Concept:

• Breathing means taking in air rich in oxygen and giving out air rich in carbon dioxide with the help of respiratory organs. 
• The taking in of air rich in oxygen into the body is called inhalation and giving out of air rich in carbon dioxide is known as exhalation.

Explanation:

• Earthworm and frogs breathe through their skin.
• The air can pass easily through their skin which makes it moist & slimly.
• Small blood capillaries are present in the moist skin region where the exchange of gases occurs.
• The oxygen gets picked by the dissolved haemoglobin, and the carbon dioxide is removed from the body.
•  Hence moist and slimy will be the correct answer.

 

• Frogs have a pair of lungs like human beings and they can also breathe through their skin, which is moist and slippery. Hence, they show two types of respiration - cutaneous & pulmonary respiration.

• Different organisms use different organs for breathing.
• Fishes breathe through the gills, Earthworm uses their moist skin, Amphibians, Reptiles & Mammals breathe using vascularised bags called the lungs.
• Cockroaches & other insects breathe through the spiracles.