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VOCABULARY. 
Carotid, the name of the arteries which pass up the neck on each side 
of the windpipe, and convey the blood to the head. 
Cartilaginous, gristly; formed from or consisting of gristle. 
Cellular, consisting of cells. 
Centripetal, having a tendency towards the centre. All bodies on the 
surface, have a tendency to fall towards the centre of the earth. 
Cetaceous, of the whale kind. 
Chrysalis, an insect in the second stage of its metamorphosis. 
' Cicatrix, a scar. 
Comminuted, broken up into small pieces. 
Conatus, attempt, endeavour, effort. 
Condyles, prominences at the ends of some of the bones which are in¬ 
tended to afford surfaces for the formation of joints. 
Congeries, a heap or pile of bodies accumulated together. 
Connate, produced or being born together; having their origin at the 
same time, and from the same cause. 
Convolution, the turning, rolling, or winding of anything. The convo¬ 
lutions of a snail’s shell are the spiral windings of the tube in which it 
exists around a central pillar or basis. 
Cornea, the transparent coat at the front part of the eye, through which 
we see the pupil and the iris. 
Corolla. This term includes what are commonly called the leaves of 
the flower, viz. the various colored leaves which give their beauty 
and fragrance to most flowers. 
Cretaceous, formed of, or consisting of chalk. It is applied not merely 
to substances consisting of chalk, commonly so called, but to a variety 
of others, which resemble it merely in having the same chemical com¬ 
position, such as the shells of shell-fish, &c. 
Cubital, an anatomical term used to designate parts in, and relating to, 
the cubit or fore-arm, which extends from the elbow to the hand. 
D. 
Deglutition, the act of swallowing. 
Diaphragm, a muscular membrane which is stretched completely across 
the cavity of the body like a curtain, and divides the chest from the 
belly, and by its contraction performs an important part in the act of 
respiration. 
Dioptric, a term applied to that part of the science of optics which 
treats of the passage of light through, and its refraction by means of, 
transparent substances. 
Dorsal, appertaining to the back. 
Ductus arteriosus, a duct or canal leading from the pulmonary arteries 
to the aorta, by which the blood is before birth conveyed from the pul¬ 
monary arteries to the aorta without passing through the lungs. It is 
closed after birth. 
Duodenum,, the first of the small intestines, being the next in order 
to the stomach, and receiving the food from it. 
E. 
Elytra, the external, hard, scaly wings of many insects, such as the 
beetles. 
Entomology, the science relating to insects. 
Epiglottis, a valve which covers the passage from the mouth into the 
windpipe. 
Eruca labra, the name of an insect 
