The A to Z of Anatomical Histological and Medical terms
Tissue (TIH-shoo) a group of similar cells that combine to form a
A
common function.
Tongue
B
(tuhng) the muscular organ of the digestive system that is
anchored to the floor of the mouth and wall of the pharynx. It plays C
major roles in swallowing and speech formation.
Tonsil (TOHN-sihl) a small organ of the lymphatic system that consists
D
of an aggregation of fixed lymphocytes & CT embedded in a mucous
E
membrane. There are 3 pairs (pharyngeal, palatine & lingual), all of
which play a role in the immune response.
F
tonsil: Lt. tonsilla = tonsil (e.g., palt.e tonsil).
G
Tooth a bony structure projecting from the maxilla or mandible that
provides for the grinding, or mechanical digestion, of food particles.
H
top- on the surface , to place
tors- twisted bulge
I
torus: Lt. = a bulge. J
Trabecula (traw-BEHK-yoo-lar) a thin plate of bone within spongy
bone tissue. (also = a band of supportive CT extending to the interior
K
of an organ from its outer wall as in the spleen or the breast).
L
trabecula: diminutive of Lt. trabs = a beam; hence the supporting
fibres of a structure.
M
Trachea (TRA-kee-aw) an organ of the respiratory system consisting
N
of a long tube supported by semi-rings of cartilage extending from the
pharynx to the bronchi.
O
trachea: Gk. tracheia = rough, referring to its corrugations.
tract: Lt. tractus = an elongated strand of wool or dough; hence a
P
pathway for nerve fibres. Q
tragus: Lt. = goat, because of the beard-like tuft of hair on its
internal aspect.
R
trans- across
S
Transitional epithelium a type of epithelial tissue characterized by
its ability to expand in size and recoil, giving the organs it lines a
T
feature of elasticity. Transitional epithelium forms the inner lining of
U
the urinary bladder and ureters
transverse: perpendicular to the long axis = horizontal.
V
Transverse colon the segment of the colon that extends across the
body from its union with the ascending colon (Left) to its union with
W
the descending colon (Left). X
trapezium: Gk. trapezion = a trapezium - a quadrilateral with 2
sides parallel.
Y
trapezius: Gk. trapezion = a trapezium - a quadrilateral with 2
Z
© A. L. Neill 150
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