Question

Describe the human respiratory system?

Answer 1

The air , passes through the nostrils.
The air that is passing is filtered by the fine hairs , which lines the passage.
Also , mucus helps in lining the passage , in the process involved.
From here , air passes through the throat and then into the lungs
In the throat , rings of cartilage are present , which ensures that the air passage does not collapse.

In the lungs , the passage is divided into very smaller tubes , that terminate into balloon like structures known as alveoli.

Alveoli is a surface that helps in the exchange of gases.

Extensive network of blood vessels is present in the walls of alveoli

When we breathe in , our ribs are lifted and diaphragm is flattened.
As a result , chest cavity becomes larger in size.

Therefore ,the air is sucked into the lungs , expanding the alveoli

Carbon dioxide are released into the alveoli by blood.

Oxygen in the alveolar air is taken by alveolar blood vessels , and is transported to all the cells in the body.

Answer 2

Answer:

The respiratory system is the network of organs and tissues that helps you to breathe. It includes your airways, lungs, and blood vessels. The muscles that power your lungs are also part of the respiratory system. These parts work together to move oxygen throughout the body and clean out waste gases like carbon dioxide.

Hope it helps......