Active transport

Osmosis

Facilitated diffusion

Passive diffusion

Ventilation is the process of moving air in and out of the stomach. It is important for gas exchange because it helps in digestion and absorption of nutrients.

Ventilation is the process of moving blood in and out of the lungs. It is important for gas exchange because it allows nutrients to enter the lungs and waste products to be removed from the body.

Ventilation is the process of moving air in and out of the heart. It is important for gas exchange because it helps in pumping oxygenated blood to the body.

Ventilation is the process of moving air in and out of the lungs. It is important for gas exchange because it allows fresh oxygen to enter the lungs and carbon dioxide to be removed from the body.

Spiracles are large openings on the body of insects that aid in gas exchange.

Spiracles are sensory organs on the body of insects that aid in gas exchange.

Spiracles are structures in the legs of insects that aid in gas exchange.

Spiracles are small openings on the body of insects that aid in gas exchange.

Large surface area, thin walls, and close proximity to capillaries.

Small surface area, thin walls, and close proximity to capillaries.

Large surface area, thick walls, and far proximity to capillaries.

Small surface area, thick walls, and far proximity to capillaries.

Surfactant increases surface tension in the alveoli.

Surfactant has no role in the alveoli.

Surfactant helps in gas exchange in the alveoli.

Surfactant reduces surface tension in the alveoli.

The gas exchange mechanisms in alveoli and gills involve filtration of gases across a thick membrane.

Alveoli exchange gases between water and blood, while gills exchange gases between air and blood.

The gas exchange mechanisms in alveoli and gills involve diffusion of gases across a thin membrane, but alveoli exchange gases between air and blood, while gills exchange gases between water and blood.

The gas exchange mechanisms in alveoli and gills involve active transport of gases across a thick membrane.

Inhalation involves the contraction of the diaphragm and the expansion of the ribcage, while exhalation involves the relaxation of the diaphragm and the contraction of the ribcage.

Inhalation involves the relaxation of the diaphragm and the contraction of the ribcage, while exhalation involves the contraction of the diaphragm and the relaxation of the ribcage.

Inhalation involves the expansion of the diaphragm and the contraction of the ribcage, while exhalation involves the contraction of the diaphragm and the expansion of the ribcage.

Inhalation involves the contraction of the diaphragm and the relaxation of the ribcage, while exhalation involves the relaxation of the diaphragm and the contraction of the ribcage.

Glands

Muscles

Nerves

Sphincters

Capillaries have thick walls that prevent gas exchange.

Capillaries have a large diameter that facilitates gas exchange.

Capillaries have thin walls and are close to body cells, facilitating gas exchange.

Capillaries have a small diameter that hinders gas exchange.

Mucus helps in the exchange of gases.

Mucus lubricates the airways and traps foreign particles.

Mucus regulates the flow of air in and out of the lungs.

Mucus filters out impurities from the air.

They transport oxygen and carbon dioxide between the alveoli and the rest of the body.

They produce mucus to trap dust and bacteria.

They regulate the opening and closing of the alveoli.

They filter out carbon dioxide from the air before it reaches the alveoli.

Gills have a large surface area and thin walls for efficient gas exchange.

Gills have thick walls to prevent water from entering the body.

Gills have a small surface area to conserve body heat.

Gills have a complex network of nerves to control the flow of water.

Capillaries transport oxygen and nutrients to the body cells and remove waste products.

Capillaries produce surfactant to reduce surface tension in the alveoli.

Capillaries help in the contraction and relaxation of the diaphragm during ventilation.

Capillaries facilitate the movement of air in and out of the lungs.