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A lymph heart is an organ which pumps lymph in lungfishes, amphibians, reptiles, and flightless birds back into the circulatory system. [ 1 ] [ 2 ] In some amphibian species, lymph hearts are in pairs, and may number as many as 200 in one animal the size of a worm , while newts and salamanders have as many as 16 to 23 pairs of lymph hearts.
In 1852, H. F. Stannius used a frog's heart in a procedure called a Stannius ligature to demonstrate the ventricle and atria beat independently of each other and at different rates. [224] The African clawed frog or platanna (Xenopus laevis) was first widely used in laboratories in pregnancy tests in the first half of the 20th century.
The largest frog is the African Goliath frog (Conraua goliath), which can reach 32 cm (13 in) and weigh 3 kg (6.6 lb). [41] Amphibians are ectothermic (cold-blooded) vertebrates that do not maintain their body temperature through internal physiological processes.
The frog's skin is green on top, but the skin on the glass frog's stomach is just as translucent as its name suggests. You can even see its organs through the skin, especially its heart, liver ...
The trabeculae carneae and the papillary muscles make up a significant percentage of the ventricular mass in the heart (12-17% in normal human adult hearts), and are correlated with ventricular end diastolic volume. [5] Trabeculae ratios of capillary-to myocyte differ between the walls of the right and left ventricle.
The general background coloration of most glass frogs is primarily lime green, the abdominal skin of some members of this family is transparent and translucent, giving the glass frog its common name. The internal viscera, including the heart, liver, and gastrointestinal tract, are visible through the skin. When active their blood makes them ...
A frog's ear drum works in very much the same way as does a human eardrum. It is a membrane that is stretched across a ring of cartilage like a snare drum that vibrates. Crossing the middle ear chamber there is an ossicle called the columella that is connected to the tympanum, and another ossicle, the operculum, that connects this to the oval ...
Hyalinobatrachium yaku is a species of frog in the family Centrolenidae.It is found in the Pastaza, Orellana and Napo Provinces of Ecuador.One of the remarkable characteristics of this species is that their belly and some internal organs are transparent leaving the red heart completely exposed through transparent parietal peritoneum and pericardium. [1]