Breathing System Basics

What is the main organ involved in the human breathing system?

• Liver

• Lungs

• Heart

• Stomach

What is the function of the diaphragm in the breathing process?

• To produce digestive enzymes

• To regulate body temperature

• To contract and expand to facilitate inhalation and exhalation.

• To store excess nutrients

Explain the process of inhalation and exhalation in the human body.

• The liver is responsible for inhalation and exhalation

• The diaphragm contracts and moves downward during inhalation, while it relaxes and moves upward during exhalation. The intercostal muscles also play a role in expanding and contracting the chest cavity to facilitate the movement of air in and out of the lungs.

• Inhalation involves the contraction of the heart muscles

• Exhalation is controlled by the kidneys

What are the tiny air sacs in the lungs where gas exchange occurs?

• Bronchioles

• Alveoli

• Pleura

• Trachea

How does the respiratory system help in maintaining the body's pH balance?

• By maintaining the levels of sodium (Na) in the blood

• By controlling the levels of oxygen (O2) in the blood

• By regulating the levels of carbon dioxide (CO2) in the blood

• By regulating the levels of glucose in the blood