Question

18. Study the diagram of human respiratory system and answer the following questions ?
R
S.
T
(a) The balloon like structures present in 'S' is:
(i) Nephron
(ii) Alveoli
(iii) Bronchi
(iv) Bronchiole
(b) Which of these organ is surrounded by cartilaginous rings?
(i) P
(ü) Q
(iii) R
(iv)s
(c) Which of these statements is incorrect regarding human lungs?
(i) It is the secondary organ for respiration.
(ii) It is located on the two sides of heart.
(iii) The membrane that encloses lungs is pleural membrane.
(iv) The alveolar epithelium of lungs is non-ciliated epithelium.
(d) Trachea is divided into two smaller tubes called
(i) Bronchi
(ü) Bronchioles
(iii) Larynx
(iv) Alveoli
(e) Which of these is the function of balloon like structure present in lungs?
(i) Exchange of gases
(ii) Absorption of nutrients
(iii) Transport of food
(iv) Removal of waste materials
​

Answer 1

Answer:

a alveoli

b Q

c it is the secondary organ for respiration

dBRONCHIOLES

e Exchange of gases

Answer 2

(a)  (ii) Alveoli - is the correct option.

During the act of breathing in and out, the alveoli are where the lungs and blood exchange oxygen and carbon dioxide. Breathing in oxygen from the air flows via the alveoli and into the bloodstream, where it travels to all of the body's tissues.

(b)  (ü) Q

16-20 rings of hyaline cartilage surround the trachea; these 'rings' are imperfect and C-shaped.

(c) (i) It is the secondary organ for respiration.

(d) (ü) Bronchioles

Bronchioles are air passageways within the lungs that branch off like tree limbs from the bronchi—the two major air tubes into which air flows after being breathed via the nose or mouth. The bronchioles transport air to small sacs called alveoli, which exchange oxygen and carbon dioxide.

(e) (i) Exchange of gases