Question

What is Respiratory system???​

Answer 1

• The respiratory system is a biological system consisting of specific organs and structures used for gas exchange in animals and plants.

• Gas exchange in the lungs occurs in millions of small air sacs called alveoli in mammals and reptiles, but atria in birds. These microscopic air sacs have a very rich blood supply, thus bringing the air into close contact with the blood.

• These air sacs communicate with the external environment via a system of airways, or hollow tubes, of which the largest is the trachea, which branches in the middle of the chest into the two main bronchi.

• These enter the lungs where they branch into progressively narrower secondary and tertiary bronchi that branch into numerous smaller tubes, the bronchioles.

• It is the bronchioles that open into the microscopic alveoli in mammals and atria in birds. Air has to be pumped from the environment into the alveoli or atria by the process of breathing which involves the muscles of respiration.

Answer 2

Answer: Mark as brainliest. Respiratory System Definition:

Respiration is necessary for every living being, and there’s a distinct, special organ system working constantly to carry it out. In humans, it is called a respiratory system.