Respiratory System Flashcards
What is the main function of the respiratory system?
To bring oxygen into the body and remove carbon dioxide.
Which structure is the main muscle involved in breathing?
The diaphragm.
What are the small air sacs in the lungs where gas exchange occurs?
Alveoli.
What is the role of the trachea in the respiratory system?
It carries air from the throat to the bronchi.
Which part of the respiratory system filters, warms, and moistens air?
The nose and nasal cavity.
What are bronchi and bronchioles?
Tubes that branch from the trachea into the lungs and lead to alveoli.
How does the diaphragm assist in inhalation?
It contracts and moves downward, creating a vacuum that pulls air into the lungs.
What gas is taken in by the respiratory system and used by the body?
Oxygen.
What gas is a waste product of respiration and exhaled from the lungs?
Carbon dioxide.
What lines the trachea to trap dust and microbes?
Cilia and mucus.
Why do alveoli have thin walls and a large surface area?
To maximize the rate of diffusion for gas exchange.
What system works closely with the respiratory system to transport gases?
The circulatory system.
