The pericardium is the sac surrounding the frog's heart.
You are possibily reffering to the inflation and deflation of a frogs "VOCAL SAC."
It allows the frog to croak.they use it to croakcollonly males have a vocal sac that use it. They use it for a love call to the female and to threaten off other animals.
A sac that holds venom.
Grasshoppers do not have an amniotic sac. Animals with amniotic sacs are mammals and birds that have a sac for the fetus to grow and gain nourishment from.
A yolk sac is a sac attached to an embryo, which provides early nourishment for bony fish, sharks, reptiles, birds, and primitive animals.
The pericardium is a thin sac that surrounds the heart. it is not part of the heart muscle itself.
The pericardium is the sac-like membrane surrounding the heart in the fetal pig, as well as in humans.
Percardial effusion is when there is fluid around the heart. This is not a common aliment. This can also lead to medical complications and should be addressed.
Heck no!
Vocal Sac
The pericardial sac, consisting of the parietal (outer) and visceral (inner) layers surrounds the heart. This contains a small amout of fluid to lubricate and cushion the heart as it expands and contracts, but it is not necessarily a gland.
Frogs don't sing in the traditional since but do have a sac that allows for a sounds like singing.
You are possibily reffering to the inflation and deflation of a frogs "VOCAL SAC."
A thin, slippery, double membrane, which is called the pericardium, surrounds the heart and lines the chest wall. The inner membrane is the visceral pericardium which covers the surface of the heart, and the outer membrane is the parietal pericardium which lines the chest wall. Between the membranes is a small amount of lubricating fluid to reduce friction during the heart's movements.(note: previous answer mentioned sinovial fluid, which incorrect, as it is found in joints and not around the heart)Reference used for above info: Page 18; Principals of Anatomy and Physiology, 12th Ed.; TorTora and Derrickson; John Wiley and Sons, Inc.
The term for puncturing the heart is cardiocentesis.
Poison Dart frogs like to mate in the Spring!
The fibrous sac of tissue that encloses the heart is the pericardium. It provides protection for the heart.