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Put a tick (✓) against the most appropriate alternative in the following statement.
The process during which food is oxidised and energy is released is called
Name the by-product formed during the oxidation of food.
What factors are most likely to affect the breathing rate?
Define the following:
Apnea
Name the following:
Miniature lungs.
Label the diagram given below:
Very short answer question.
Name the organ which prevents the following the entry of food into the trachea while eating.
Match the following.
| 1. | Digestive System | Kidney |
| 2. | Respiratory system | Brain |
| 3. | Circulatory system | Alimentary canal |
| 4. | Excretory system | Heart |
| 5. | Nervous System | Lungs |
Which of the following is the main function of the 'C' shaped cartilages of trachea?
Due to which of the following reason lungs do not collapse between breaths and some air always remains in the lungs which can never be expelled?
The part where the exchange of gases occurs during respiration is:
Choose the odd one:
The pulmonary artery carries blood from the lungs to the left atrium.
The bronchi divide further and end in small air sacs called ______.
The windpipe is called the larynx.
What is the significance of ciliated epithelium present in the nostrils?
Which one of the following is a part of the human lower respiratory system?
Name the lymphoid organ present in the human pharynx.
Which of the following divides nasal cavity?
Measure the breathing rate of the members of your family and some of your friends. Investigate:
- If the breathing rate of children is different from that of adults.
- If the breathing rate of males is different from that of females If there is a difference in any of these cases, try to find the reason.
