Respiratory System

Front

What is the trachea?

Back

The trachea, also known as the windpipe, is a tube that connects the pharynx and larynx to the lungs, directing air into the bronchi.

Front

What are alveoli?

Back

Alveoli are tiny air sacs in the lungs where gas exchange occurs, allowing oxygen to enter the blood and carbon dioxide to be expelled.

Front

What is the primary site of gas exchange in the respiratory system?

Back

The primary site of gas exchange is the alveoli.

Front

What happens to the diaphragm during exhalation?

Back

During exhalation, the diaphragm relaxes and moves upward, reducing the volume of the thoracic cavity.

Front

What role do the intercostal muscles play during exhalation?

Back

During exhalation, the external intercostal muscles relax, while the internal intercostal muscles contract to help push air out of the lungs.

Front

What muscles are involved in forced inhalation?

Back

In addition to the diaphragm, the sternocleidomastoid and pectoralis major muscles are used during forced inhalation.

Front

What is the function of the epiglottis?

Back

The epiglottis is a flap of tissue that covers the trachea during swallowing to prevent food and liquid from entering the airway.

Front

What is the role of mucus in the respiratory system?

Back

Mucus traps dust, pathogens, and other particles in the air, helping to keep the airways clear and protect the lungs.

Front

What is the difference between bronchi and bronchioles?

Back

Bronchi are the larger air passages that branch from the trachea into the lungs, while bronchioles are smaller branches that lead to the alveoli.

Front

How does the respiratory system maintain homeostasis?

Back

The respiratory system maintains homeostasis by regulating the levels of oxygen and carbon dioxide in the blood through gas exchange.