Answer the following questions in detail.
1. Explain the mechanism of breathing in human beings.
2. Show with an activity that roots of plants also respire.
3. Explain the process of exchange of gases in insects. Draw a diagram in support of your answer.
4. Justify the statement that composition of inhaled and exhaled air is not same.
5. Differentiate between the following pairs:
a. Aerobic and anaerobic respiration
b. Breathing and respiration
c. Inhalation and exhalation
Answers
Explanation:
I) When we breathe in, the diaphragm contracts and moves downward. This increases the space in the chest cavity into which our lungs expand. Thus, the intercostal muscles between the ribs enlarge the chest cavity.
ii) the roots of a plant respire through the root hairs stop the oxygen present in between the soil particles enters into the root hairs through diffusion.
iii) Tracheal Breathing. Insects, and some other invertebrates, exchange oxygen and carbon dioxide between their tissues and the air by a system of air-filled tubes called tracheae. Tracheae open to the outside through small holes called spiracles.
iv)The inhaled gas is the oxygen while the exhaled gas is carbon dioxide. ... It would glitter in the presence of oxygen. On the other hand, it gets extinguished when brought near the exhaled gas that is carbon dioxide.
v)please refer the attachment
