Review 4.5 - 4.6: Respiratory System

Front

What structures does the pharynx connect?

Back

The pharynx connects the nasal cavity to the larynx and the oral cavity to the esophagus.

Front

What happens to the diaphragm during inhalation?

Back

During inhalation, the diaphragm descends.

Front

What occurs to oxygen (O₂) during external respiration in the lungs?

Back

Oxygen (O₂) enters pulmonary capillaries and binds with hemoglobin in red blood cells.

Front

What is the role of the diaphragm in the respiratory system?

Back

The diaphragm separates the thoracic and abdominal cavities.

Front

What is the definition of external respiration in the respiratory system?

Back

External respiration is the exchange of gases between alveoli and pulmonary capillaries.

Front

What is the primary function of the respiratory system?

Back

The primary function of the respiratory system is to facilitate gas exchange, providing oxygen to the body and removing carbon dioxide.

Front

What is the pathway of air from the nasal cavity to the lungs?

Back

Air travels from the nasal cavity to the pharynx, then to the larynx, trachea, bronchi, and finally to the lungs.

Front

What is the significance of alveoli in the respiratory system?

Back

Alveoli are the sites of gas exchange in the lungs, allowing oxygen to enter the blood and carbon dioxide to be expelled.

Front

How does the diaphragm contribute to breathing?

Back

The diaphragm contracts and flattens during inhalation, increasing the thoracic cavity volume and drawing air into the lungs.

Front

What is the difference between internal and external respiration?

Back

External respiration refers to gas exchange in the lungs, while internal respiration refers to gas exchange at the cellular level.