Alveoli

The video explains the process of gas exchange between blood and the atmosphere, focusing on alveoli found at the ends of the lungs. These structures are lined with capillaries and are slightly elastic, expanding during inhalation. Alveoli are unique to mammals, highlighting their specialized role in respiratory function.

Where does the exchange of gases between blood and the atmosphere occur?

• In the alveoli

• In the stomach

• In the heart

• In the kidneys

Where are alveoli located in the respiratory system?

• In the diaphragm

• In the trachea

• At the ends of the lungs

• In the nasal cavity

What surrounds the alveoli to facilitate gas exchange?

• Capillaries

• Muscles

• Bones

• Nerves

What characteristic of alveoli allows them to expand during inhalation?

• Their color

• Their thickness

• Their elasticity

• Their rigidity

In which type of animals are alveoli found?

• Fish

• Mammals

• Reptiles

• Birds