Caption: Coqui frog skin and spiracles (Eleutherodactylus coqui). The coqui, also called the little frog in Puerto Rico, has only a minute tail when it is born, which quickly disappears. The frog is covered by a soft, thin, moist skin composed of two layers, an outer epidermis and an inner dermis. The skin does not merely protect the frog but helps in respiration. Breathing pores in skin are called spiracles. An extensive network of blood vessels runs throughout the frog's skin. Oxygen can pass through the membranous skin, thereby entering directly into the blood. When a frog submerges beneath the water, all its respiration takes place through the skin. Oxygen is obtained directly from the water. The frog does not breathe through its skin alone. Adult frogs have paired, simple, saclike lungs.
Magnification*: x6000
Type: SEM
Copyright 2005 Dennis Kunkel Microscopy, Inc.
Keywords: 25138A,08.01.05,breathing pore,breathing pores,coqui frog,frog spiracle,frog spiracles,inner dermis,membranous skin,Misc. Vertebrates,outer epidermis,SEM,frog epithelia,frog epithelium,frog skin,amphibian,amphibians