How to Say "air sac" in Spanish
The Spanish word for “air sac” is “vejiga” — A2 level. This is a very common word in everyday Spanish.
Examples
Tengo que ir al baño porque tengo la vejiga llena.
I have to go to the bathroom because I have a full bladder.
El médico me hizo una ecografía de la vejiga.
The doctor did an ultrasound of my bladder.
Algunos peces tienen una vejiga natatoria para flotar.
Some fish have a swim bladder to stay afloat.
Using 'La' with Body Parts
In Spanish, we use 'la' (the) instead of 'mi' (my) when talking about body parts like the bladder. Say 'me duele la vejiga' instead of 'me duele mi vejiga'.
Always Feminine
The word 'vejiga' is always feminine, so any describing words must match: 'vejiga pequeña' (small bladder).
Confusing with 'Vieja'
Mistake: “Using 'vieja' (old woman) instead of 'vejiga'.”
Correction: They sound similar but have very different meanings! Use 'be-HEE-gah' for the organ.
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