CHROMATIN
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.
CILIA
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.
COMMENSALISM
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.
COMPACT NUCLEI
Nuclei in which there are no clear areas of nucleoplasm and
chromatin matter is distributed throughout the nucleus as
opposed to being peripheral.
CONJUGATION
A sexual union of one organism with another in which
nuclear material is exchanged.
CONOID
A truncated cone of spiral fibri.Is located within the polar
rings of the Coccidia.
CONTRACTILE
Vacuoles which are involved in the osmoregulation of certain
VACUOLES
protozoan cells by pumping accumulated water out of the
cell.
COPEPOD
A minute usually freshwater crustacean which serves as an
intermediate host in the life cycle of Diphyllobothrium and
Dracunculus.
COPULATORY BURSA
A tripartite appendage at the posterior end of the male of
certain nematodes.
CORACIDIUM
A larva with a ciliated epithelium that develops in the egg of
certain pseudophyllidean cestodes.
COSTA
The thickened base of an undulating membrane of some
flagellate protozoa.
MD0841
A-4