Dieting and Weight Loss
In what way is a tubular gut that is one with both mouth and an anus an advantage over a simple saclike gut?
Asked in Digestive System
Which organ in the digestive system moves food from the mouth to the stomach?
What hydra looks likes?
How do you pass a mouth swab drug test if you smoke same day?
Asked in Frogs
What are the differences between a frog's inside nostril and a human's inside nostrils?
The frog's inside nostril is on the roof of its mouth while the human's inside nostril is in the back of the mouth. The frog does not breathe through its skin alone. Adult frogs have paired, simple, saclike lungs. As in humans, air enters the body through two nostrils, passes through the windpipe, and is received by the lungs. The mechanism of breathing, however, is different in the frog from that in man. In humans, breathing is aided by the ribs, the diaphragm, and the chest muscles. The frog has no ribs or diaphragm, and its chest muscles are not involved in breathing. A frog may breathe by simply opening its mouth and letting air flow into the windpipe. However, it may also breathe with its mouth closed. The floor of the mouth is lowered, causing the frog's throat to "puff out." When the nostrils open, air enters the enlarged mouth. Then, with nostrils closed, the air in the mouth is forced into the lungs by contraction of the floor of the mouth.