The A to Z of Anatomical, Histological and Medical Terms

The A to Z of Anatomical Histological and Medical terms
Posterior root the structure merging with the SC on its posterior
A
aspect that contains sensory nerves. (also = the dorsal root).
Posterior pituitary gland
B
the part of the pituitary gland at the base
of the brain consisting of the axons of neurons originating in the C
hypothalamus and supporting tissue.
posture: Lt. positus = placed; hence, the position of the body as a
D
whole at a given moment, e.g. erect, recumbent, prone, supine,
E
sitting, kneeling.
prae- in front of before
F
pre- in front of before
G
precuneus: Lt. pre = before, and cuneus = wedge; the parietal
lobule anterior to the cuneus.
H
prepuce: Lt. praeputium = foreskin (of penis or clitoris).
presby- old
I
prim- first J
Primary germ layer One of 3 layers of cells that differentiate during
the embryonic stage to give rise to all tissues in the body. They are the
K
endoderm, mesoderm, and ectoderm.
L
princeps: Lt. primus = chief, and capere = to take; hence chief or
principal.
M
procerus: Lt. = slender, elongated; hence, the vertical slip of
N
muscle between the medial part of frontalis and the root of the
nose.
O
pro- in front of
Process (PROH-sehs) general term used to describe any marked
P
projection or prominence Q
process/processus: Lt. = going forwards, indicating growing out,
ie. an outgrowth, usually bone eg, the zygomatic process of the
R
temporal.
S
proct- anus rectum
profundus: Lt. pro = before, and fundus = bottom; hence
T
profundus = deep.
U
prominens: Lt. = projecting.
promontory: Lt. promontorium = a headland, ie. part of land
V
jutting into the sea - a bony prominence.
pronate: Lt. pronatus = bent forwards; to pronate = to turn the
W
hand so that the palm faces downwards or posteriorly X
supinate.
prone: Lt. pronatus = bent forwards; recumbent face-down
Y
posture.
Z
© A. L. Neill 132
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