As said before, Frogs do have respiratory system that in return helps the cardiovascular system, they have two lungs and one heart, with 3 chambers, they breathe in air through not only their nostrils but skin as well. That’s right, Frogs have a thin membranous tissue for skin and after it goes through cellular respiration (C6H12O6 + 6O2 = 6CO2 + H2O + ATP), the CO2 leaves through that skin and the H2O keeps the skin …show more content…
Seeing how the Frog uses veins to carry its blood through the body, then that means it has a closed circulatory system, rather than an open one where the blood is just kinda floating about. Moving on the digestion of a Frog, they use their long tongues to latch onto various types of bugs and pull it into its mouth and forcefully pushes its prey down the Frog’s throat. From there, the food then goes to the pharynx, then the oesophagus (basically swallowing), and finally the stomach. The stomach uses a mixture of acids and enzymes to break down the food and sends it to the small intestine, then the large intestine where nutrients and water is absorbed and once done, it all goes to the bladder. With all that said, the Frog has a complete digestive system because food goes in through the mouth and out the anus, compared to an incomplete system where it all goes in and out through one opening. Now with the reproductive system, male Frogs have testis with sperm, females have ovaries with eggs and are connected to the kidneys. Male Frogs have to use their vocal chords to sing to female Frogs and try to wooing them into with mating