Question

1. How is small intestine designed to absorb digested food?

2. What are stomata? Draw a labelled diagram of stomata
2. Draw a diagram showing Human Respiratory system. Label the following

parts

i) Larynx ii) Trachea

iii) Bronchus iv) Lungs​

Answer 1

1)The small intestine has millions of tiny finger-like projections called villi. These villi increase the surface area for food absorption. Within these villi, many blood vessels are present that absorb the digested food and carry it to the blood stream. From the blood stream, the absorbed food is delivered to each and every cell of the body.

2)Stomata are small pores present in the epidermis of leaves. They regulate the process of transpiration and gaseous exchange. The stomatal pore is enclosed between two bean-shaped guard cells. The inner walls of guard cells are thick, while the outer walls are thin. The guard cells are surrounded by subsidiary cells. These are the specialised epidermal cells present around the guard cells. The pores, the guard cells, and the subsidiary cells together constitute the stomatal apparatus.

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Answer 2

1. Villi are present in the small intestine which helps to increase the surface are of the absorption. Rest process is in Pic1.

2. Stomata are small pores present in the leaf. They are surrounded by gaurd cells which help in closening and opening of stomata. Their functions performed by them are as follows-: 1)They allow exchange of gases from the surrounding medium. Usually, carbon dioxide is taken up and oxygen is released.

3. in diagram..pic3.

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