Question

The human bronchiolas divide and subdivide deep into lungs and finally open into a very large number of:
(a) Alveoli
(b) Air sacs
(c) Bronchi
(d) Blood capillaries​

Answer 1

Answer:

The respiratory system includes the nose, mouth, throat, voice box, windpipe, and lungs.

Air enters the respiratory system through the nose or the mouth. If it goes in the nostrils (also called nares), the air is warmed and humidified. Tiny hairs called cilia (SIL-ee-uh) protect the nasal passageways and other parts of the respiratory tract, filtering out dust and other particles that enter the nose through the bre