One alveolus is a singular, tiny air sac of the lung, surrounded by a network of capillaries, and through which oxygen and carbon dioxide are exchanged. A cluster of such air sacs are alveoli (plural of alveolus).
The word 'alveoli' is plural for 'alveolus'.
Alveolus is singular and alveoli is plural.
alveolus
The singular form of the word flagella is flagellum.
The word 'duo' is the singular form; the plural form is duos.
That is the singular form; the plural form is those.
'Jackhammer' is the singular form.
The singular form is commando.
The word dog is the singular form.
"Biopsy" is the singular form, while "biopsies" is the plural form.
Alveoli alveoli - air sacs in your lungs
The singular form of the word "possum" is possum. The plural is possums.
The singular form of the word "criteria" is "criterion."
The singular form of "genera" is "genus".
The singular form for diagnoses is diagnosis.