SEHS Gas Exchange

Front

What is the primary function of gas exchange in the human body?

Back

To allow oxygen to enter the bloodstream and carbon dioxide to be removed.

Front

Where does gas exchange primarily occur in the human body?

Back

In the lungs.

Front

What are the main structures involved in the respiratory system for gas exchange?

Back

Nose, mouth, pharynx, larynx, trachea, bronchi, bronchioles, and alveoli.

Front

What is the role of alveoli in gas exchange?

Back

Alveoli are tiny air sacs where gas exchange takes place.

Front

What adaptations do alveoli have for efficient gas exchange?

Back

Large surface area, good blood supply, short diffusion distance, and moist surfaces.

Front

How many alveoli are approximately present in the human lungs?

Back

About 700 million.

Front

What is the process of gas exchange through diffusion?

Back

Oxygen diffuses from the alveoli to the bloodstream, and carbon dioxide diffuses from the bloodstream to the alveoli.

Front

What are the two factors that efficient gas exchange depends on?

Back

Ventilation and perfusion.

Front

What is external respiration?

Back

The exchange of gases between the alveoli and the blood in the pulmonary capillaries.

Front

What happens during internal respiration?

Back

Oxygen diffuses from the blood into the cells, and carbon dioxide diffuses from the cells into the blood.