ecdysis:

molting of a cuticle.

ectoparasite:

a parasite that lives on the outer surface of a host.

edema:

accumulation of excess fluids in the tissues.

egg:

a series of protective membranes enclosing a zygote and any subsequent developmental stages until their emergence from the membranes.

ejaculatory duct:

in Nematoda and Acanthocephala, the terminal portion of the male reproductive system which connects to the cloaca and expels spermatozoa during copulation.

embryonated:

an egg containing a fully-developed embryo.

embryonation:

the processes of development of an embryo from a fertilized egg.

encapsulation:

the formation of a capsule of host tissue around a parasite as a host defense response.

encystment:

secretion of a cyst wall by a parasite around itself.

endosome:

RNA rich structure within the nucleus of some Protozoa.

engorged:

possessing a swollen body after taking a blood meal.

ensheathed:

a nematode larva which retains the cuticle from a previous molt.

epimastigote:

a form of Trypanosomatidae with the flagellum arising anterior to the nucleus, and possessing an undulating membrane.

erythrocytic cycle:

the later part of the life cycle of malarial organisms in which erythrocytes of the vertebrate host are involved.

esophagus:

the muscular or glandular portion of the digestive tract between the mouth and stomach or intestine.

excretory vesicle:

a bladder into which the excretory ducts empty.

exflagellation:

the release of microgamete from a microgametocyte of malarial organisms.

exoerythrocytic cycle:

the first part of the life cycle of malarial organisms in which tissues of the vertebrate host other than the blood are involved.

extracellular:

located outside of host cells, in tissues or in body cavities.