In cockroaches, air enters the body through

Sometimes when we do heavy exercise, anaerobic respiration takes place in our muscle cells. What is produced during this process?

Yeast is used in wine and beer industries because it respires

Fish breathe with the help of gills which are richly supplied with blood vessels. The gills help the fish to

Earthworms and frogs breathe through their skin because of which the skin of both the organisms is

During aerobic respiration, the food is broken down into_____ and _____ and releases a lot of ______

Taking in of air rich in O₂ inside the body is called _____

Breathing rate of a person is not always ______

Unwanted particles like smoke, dust, pollen, etc., are called................

Lungs are very..............organ

During heavy exercise, the breathing rate of a person slows down.

Frogs breathe through their skins as well as their lungs.

The fishes have lungs for respiration.

The size of the chest cavity increases during inhalation.

Oxygen breaks down glucose outside the cells of organisms.

Sometimes we see that farmers loosen the soil. What is the reason behind it?

What changes are observed in diaphragm during inhalation?

In the experiment, where we exhale into lime water containing glass. What changes were observed by you?

Name the respiratory organs in frogs.

Certain small pores are present on the surface of plant through which gaseous exchange occurs. Identify these pores?

Insects and leaves of a plant have pores through which they exchange gases with the. atmosphere. Can you write two points of differences between these pores with respect to their position, number and extension into the body?

Frogs are amphibians. They survive on land and water, do they have any respiratory issue? How does frog breathe when they are in water? Do they possess lungs? Explain the role of lungs in frogs.

After we work hard or perform physical activity, we feel hungry. Explain why

There are three animals named A, B and C. Among them A can stay on land as well as in water. When it stays at land is respire through lungs but when it goes into water, it respires through its moist skin. Animal B has specific organs to respire in the water which is not found in any other water animal. While animal C is a water animal which respires through nostrils and lungs. Now give the name of animal A, B and C.

A girl was suffering from cold and was sneezing continuously. She joined her family at dinner and suddenly started sneezing without covering her nose, thus sending particles all over the place. On realising her mistake, said sorry and next time covered her nose.
(a) During sneezing, what are the precautionary steps to be followed?
(b) Can infections be passed from one person to another via sneezing?
(c) Is sneezing a respiration process?
(d) What values do we pick from this situation?

Paheli participated in a 400 m race competition held at her school and won the race. When she came home she had mixed feelings of joy and pain as she had cramps in her leg muscles. After a massage, she was relieved of the pain. Answer the following questions related to the situation.
(a) What can be the possible reasons for the pain in her legs?
(b) Why did she fell comfortable after a massage?

Observe the figures carefully and answer the following questions.

(a) Which process is being tested in the activity?
(b) What is the result of the activity? Give reasons.