What is virtual dissection? Is it true that sadistic Americans dissect frogs at school?
Frogs have a very interesting anatomy. They have highly specialized structures, such as a long, sticky tongue which they use to capture food. The anatomical structures of the bones in their upper and hind legs are also highly specialized for jumping and leaping. They have other structures however, that appear useless. Their weak teeth is an example of this. Frogs breathe through their skin when underwater. Oxygen in the water can pass through their porous skin and go directly to the blood. They also have a pair of lungs that allow them to breathe when on land. Frogs have a three-chambered heart with two atria and one ventricle. A valve within the heart, called the spiral valve, directs the flow of blood to prevent oxygenated and de-oxygenated blood from mixing. Frogs have a highly developed sense of hearing. They can detect high-pitched sounds with their ears and low-pitched sounds through their skin. They also have a highly developed sense of sight and smell. Frogs can detect predator
