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32 Topic Pages Found in Biology and starting with the letter E
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Open Ear

organ of hearing and equilibrium. The human ear consists of outer, middle, and inner parts. The outer ear is the visible portion; it includes the


terrestrial, cylindrical segmented worm of the class Oligochaeta. There are 2,200 earthworm species, found all over the world except in arid and

Open Eating disorders
Eating disorders

The term ‘eating disorders’ covers OBESITY , feeding problems in childhood, anorexia nervosa, and bulimia nervosa. The latter two are described here.

Open Ebola

( ēbō'lə ), a member of a family ( Filovidae ) of RNA viruses that cause hemorrhagic fevers. The virus, named for the region in Congo (Kinshasa) where

Open Echidna

( ĭkĭd'nə ) or spiny anteater, animal of the order Monotremata, the egg-laying mammals. A short-legged, grayish brown animal, the echidna is covered

Open Echinodermata

( əkì´´nōdûr'mətə ) [Gr.,=spiny skin], phylum of exclusively marine bottom-dwelling invertebrates having external skeletons of calcareous plates just

Open Ecology

Ecology is possibly one of the most ancient disciplines. Its evolution has been gradual, and it will continue to evolve with humankind's ability to


Eczema, or atopic dermatitis, is commonly found in people with a family history of eczema, hay fever, or asthma. As with asthma, a variety of


( ĭdē'mə ), abnormal accumulation of fluid in the body tissues or in the body cavities causing swelling or distention of the affected parts. Edema of


common name for any fish in the order Anguilliformes, and characterized by a long snakelike body covered with minute scales embedded in the skin. Eels