No, a voice box and a vocal sac are not the same. The voice box, or larynx, is an organ in mammals that produces sound through the vibration of vocal cords. A vocal sac, on the other hand, is an anatomical feature found in some amphibians, like frogs, that helps amplify their calls during mating or territorial displays. While both are related to sound production, they serve different functions and are found in different groups of animals.
Vocal Sac
Vocal Sac
In some frog species, you can determine the sex of a frog based on the development of a vocal sac. If the vocal sac is present, the frog is a male.
The lungs, nostrils, skin, and vocal sac.
Because only the males calls.
Although I am not entirely sure, I think it might be an egg sac or a vocal sac? Not entirely sure though. Try researching it in Google under the description you gave us.
You are possibily reffering to the inflation and deflation of a frogs "VOCAL SAC."
because only males emit mating calls.
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In some frog species, you can determine the sex of a frog based on the development of a vocal sac. If the vocal sac is present, the frog is a male.
Poison Dart frogs like to mate in the Spring!
There is no such thing as an "ovarian sac". The amnion is a membrane building the "amniotic sac" that surrounds and protects an embryo.