The dark staining portion of a cell nucleus which carries the
genetic components of the cell and displays characteristics
useful in species identification.
CHROMATOIDAL BARS Masses of RNA, visible as dark staining bodies with light
microscopy, in young cysts of the amoeba.
Short hair-like organelles of locomotion composed of a
surrounding sheath and a central axoneme seen in the class
Ciliophora or Ciliata.
A copulatory organ of the cestodes and trematodes usually
opening into a common genital atrium.
A kind of symbiosis in which one organism, the commensal,
is benefited and the other, the host, is neither benefited nor
harmed by the relationship.
Nuclei in which there are no clear areas of nucleoplasm and
chromatin matter is distributed throughout the nucleus as
opposed to being peripheral.
A sexual union of one organism with another in which
nuclear material is exchanged.
A truncated cone of spiral fibri.Is located within the polar
rings of the Coccidia.
Vacuoles which are involved in the osmoregulation of certain
protozoan cells by pumping accumulated water out of the
A minute usually freshwater crustacean which serves as an
intermediate host in the life cycle of Diphyllobothrium and
A tripartite appendage at the posterior end of the male of
A larva with a ciliated epithelium that develops in the egg of
certain pseudophyllidean cestodes.
The thickened base of an undulating membrane of some