The A to Z of Anatomical Histological and Medical terms
Mast cell (MAH-st) a basophil that has migrated out of the BS to the
A
extracellualr tissue generally found in loose CT. It secretes heparin (an
B
anticoagulant) and seratonin (promotes inflammation) and the immune
response . C
mastication: Lt. masticere = to chew.
mastoid: adj.Gk. mastos = breast or teat, and eidos = shape or
D
form. (mass-toyd)
E
Matrix (MAY-trihks) the intercellular material in CT.
matrix: Lt. = a female animal used for breading, womb; refers to
F
ground substance of CT, and nail bed.
G
maxilla: Lt. = jaw-bone; now used only for the upper jaw; adj.-
maxillary.
H
maz- breast
meat- opening
I
Meatus (mee-AY-tus) canal opening passage J
meatus: Lt. = passage; adj.- meatal.
medi- middle, intermediate
K
Medial (MEE-dee-al) a directional term describing a part lying nearer
L
to the vertical midline of the body relative to another part.
medial: adj.Lt. medius = middle; hence, nearer the median plane.
M
median: Lt. medianus = in the middle.
N
Mediastinum (mee’-dee-ah-STIH-nuhm) the region in the thoracic
cavity b/n the two peural cavities. It consists of the heart, part of the
O
oesophagus, part of the trachea, and the major vessels of the heart.
mediastinum: Lt. medius = middle, and stans = standing; a
P
median vertical partition, adj - mediastinal. Q
medius: Lt. = middle.
Medulla (meh-DUL-ah) an inner, or deeper, part of an organ. e.g. the
R
medulla of the kidneys, the medulla of the adrenal gland & the lymph
S
node. ≠ cortex
medulla: Lt. = marrow; applied to part of an organ deep to its
T
cortex; & to the SC & adjoining part of brain stem adj - medullary
U
Medulla oblongata (meh-DUHL-ah ob’-long-GAR-tah) the inferior
part of the brain stem.
V
Medullary cavity (mehd-UL-lar-ee KAV-ih-tee) the potential space
w/n the shaft of a long bone. In the adult this contains yellow marrow.
W
meg- large X
megalo- large
meio- reduce, contract
Y
mel- limb, cheek
Z
© A. L. Neill 114
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