The Human Body Major Systems & Organs - Respiratory System

The video explains the similarities between combustion in cars and metabolism in humans, focusing on the role of oxygen. It details the structure and function of the lungs, highlighting their role in gas exchange. The process of oxygen intake and carbon dioxide expulsion is described, along with the mechanics of breathing involving the diaphragm. Additionally, the lungs' function as a defense mechanism against diseases is discussed.

What is the primary function of the respiratory system in the human body?

• To digest food

• To exchange gases

• To produce energy

• To circulate blood

Which part of the respiratory system is responsible for transporting air to the lungs?

• Alveoli

• Trachea

• Diaphragm

• Larynx

How does oxygen enter the bloodstream from the alveoli?

• Through active transport

• By diffusion

• Via osmosis

• Through endocytosis

What role does the diaphragm play in breathing?

• It filters air

• It contracts to create negative pressure

• It exchanges gases

• It stores oxygen

What is the primary function of the lungs during exhalation?

• To absorb oxygen

• To produce hemoglobin

• To release carbon dioxide

• To filter blood

How do the lungs protect the body from harmful organisms?

• By filtering out pathogens

• By storing white blood cells

• By producing antibodies

• By increasing blood pressure

What happens when bacteria enter the lungs?

• The lungs produce mucus

• The lungs stop functioning

• The lungs filter them out

• The lungs increase oxygen intake