biology-dictionary_11-06-2009

(ff) #1

Centriole
A structure in an animal cell, composed of cylinders of microtubule triplets arranged in a 9 +
0 pattern. An animal cell usually has a pair of centrioles, which are involved in cell division.
Centromere
The centralized region joining two sister chromatids.
Centrosome
Material present in the cytoplasm of all eukaryotic cells and important during cell division;
also called microtubule-organizing center.
Cephalochordate
A chordate without a backbone, represented by lancelets, tiny marine animals.
Cerebellum
Part of the vertebrate hindbrain (rhombencephalon) located dorsally; functions in
unconscious coordination of movement and balance.
Cerebral cortex
The surface of the cerebrum; the largest and most complex part of the mammalian brain,
containing sensory and motor nerve cell bodies of the cerebrum; the part of the vertebrate
brain most changed through evolution.
Cerebral ganglia
They transmit nerve pulse activity so nerve cells can 'talk' to each other.
Cerebral hemispheres
Either of the two symmetrical halves of the cerebrum, as divided by the longitudinal
cerebral fissure.
Cerebroside
Any of various lipid compounds containing glucose or galactose and glucose, and found in
the brain and other nerve tissue.
Cerebrum
The dorsal portion, composed of right and left hemispheres, of the vertebrate forebrain; the
integrating center for memory, learning, emotions, and other highly complex functions of
the central nervous system.

Free download pdf