Question

What is the sentence part between the commas called?

My cat, her limbs all tucked in neat and rounded, was deep asleep.

Answer 1

a phrase, im not sure if there is a name for that

Answer 2

Parenthetical comma

Step-by-step explanation:

My cat was deep asleep. (This still makes sense)

These work just as parentheses would. If you remove anything in between the commas, the statement should still make sense.