As an Amazon Associate I earn from qualifying purchases.

What is Alveoli in Biology? PDF | Download eBooks

Learn Alveoli definition in biology with explanation to study “What is Alveoli”. Study alveoli explanation with biology terms to review biology course for online degree programs.

Alveoli Definition

  • Air sacs are small pouches of air clustered at the tips of the tiniest bronchioles.

    Campbell Biology by J.B. Reece, L.A. Urry, M.L. Cain, S.A. Wasserman, P.V. Minorsky, R.B. Jackson

Alveoli Explanation

The pulmonary alveolus , which are also called alveoli, is a hollow cavity found in the lung parenchyma, and is the basic unit of ventilation. Lung alveoli are the ends of the respiratory tree, branching from either alveolar sacs or alveolar ducts, which like alveoli are both sites of gas exchange with the blood as well. Alveoli are particular to mammalian lungs. Different structures are involved in gas exchange in other vertebrates. The alveolar membrane is the gas exchange surface.

Keep Learning Biology Explanations

What is Epiphyte?

Epiphytes produce and gather their own nutrients; they do not tap into their hosts for sustenance. Usually anchored to the ...

What is Glycogen?

Glycogen is a multibranched polymer of glucose and is not a linear molecule. It has the same monomers as starch ...

What is Activator?

Activator is a DNA-binding protein that regulates one or more genes by increasing the rate of transcription. Most activators are ...

What is Template strand?

Template strand is the strand that actually acts as a template for the production of a new DNA strand. When ...

What is Acid?

A substance that donates the protons and accepts electrons. When an acid is dissolved in aqueous solutions, H ions are ...

What is Transformation?

A cell is said to have been transformed when a foreign DNA incorporates itself in the cell. This may happen ...