Human Respiratory System Concepts

The video explains the importance of oxygen for living organisms and details the human respiratory system, including organs like the nose, larynx, trachea, bronchus, and lungs. It covers the functions of these organs, reflex actions like choking, and the differences between chest and abdominal respiratory systems. The video concludes with a teaser for the next topic on dealing with smoke inhalation.

Why do living beings need oxygen?

• To survive and perform cellular functions

• To regulate body temperature

• To digest food

• To produce carbon dioxide

What is the primary function of the human respiratory system?

• To circulate blood

• To regulate body temperature

• To exchange oxygen and carbon dioxide

• To digest food

Which organ is NOT part of the human respiratory system?

• Heart

• Trachea

• Larynx

• Nose

Why is it better to breathe through the nose rather than the mouth?

• The nose has mucus and fine hairs to filter the air

• The mouth cannot inhale oxygen

• The nose is closer to the lungs

• The mouth is used for eating

What is the function of the mucous membrane in the trachea?

• To digest food

• To block foreign objects from entering the lungs

• To circulate blood

• To produce sound

What is choking?

• A process of digesting food

• A method to regulate body temperature

• A way to inhale more oxygen

• A reflex motion to remove objects from the respiratory tract

What connects the nose to the trachea?

• Alveoli

• Larynx

• Diaphragm

• Bronchus

What happens during chest respiratory system?

• The diaphragm contracts

• The diaphragm relaxes

• The rib muscles contract, enlarging the chest cavity

• The lungs shrink

What is the role of the diaphragm in abdominal breathing?

• To contract and relax, changing the chest cavity size

• To circulate blood

• To filter air

• To produce sound

What happens when the diaphragm muscles relax during abdominal breathing?

• The chest cavity enlarges

• The chest cavity shrinks

• The rib cage rises

• The lungs expand