What is a Frog?
The anatomy of the frog is similar, although much simpler, to that of mammals. A frog’s body consists of a head, short neck, front and back limbs and a trunk region, which contains the heart, lungs, stomach, intestine and gonads (reproductive organs). Both liquid and solid wastes leave the body through a single opening, known as the cloaca. A frog’s body is supported and protected by a skeleton. Frogs do not have ribs. The heart is protected by a panel of cartilage that extends across the “front” of the body from arm to arm. They are covered by a thin, moist skin. The skin has two layers, an outer epidermis and an inner dermis. There is also a thin exterior cuticle layer that the animal regularly sheds and eats. (People often think the frog is convulsing when they see this process for the first time). The skin supplies the frog’s body with oxygen. When under water, dissolved oxygen is able to pass through the frog’s skin directly into blood vessels. From here it is delivered to the tis
