Glossary of Technical Terms. 



Abdomen. — That portion of the body which contains the internal or- 

 gans. Belly. 



Air sac. — One of the membranous sacs filled with air in different parts 

 of the body, especially in the abdominal region.. 

 They often extend into the cavities of the bones 

 and connect with the kmgs. 



Albumen portion of oviduct. — See p. 157. 



Anaemia. — A condition in which the blood is deficient either in quality 

 or quantity. It is marked by paleness and loss of 

 energj'. 



Anus. — The external opening of the intestine. Vent. 



Apathetic. — Lacking in feeling or ambition. Indifferent. 



Arachnida. — A class of invertebrate animals including among other 

 groups the spiders, scorpions and mites. 



Articular. — Pertaining to the joints. 



Astringent. — Causing contraction and arresting discharges. 



Atony. — Lack of normal tone or strength. 



Atrophy. — A wasting of diminution of the size of ?, part. 



Auditory meatus. — The opening into the ear. 



Avian. — Pertaining to birds. 



Axilla. — The region under the wing where the latter joins the body. 



Bile. — The substance secreted by the liver. Gall. 



Bronchi. — The tubes which lead from the end of the windpipe (trachea) 

 to the two Jungs, (cf. fig. 12). 



Carcinoma. — A malignant tumor or cancer. 



Catheter. — A tubular surgical instrument for discharging fluids from a 

 cavity of the body or for distending a passage. 



Cecum (plural ceca). — A blind intestinal pouch of which there are two 

 in the fowl. 



Cell. — The smallest element of an organized body that manifests inde- 

 pendent vital activities. A morphological or struc- 

 tural unit of an organism. 



Chronic. — Long continued but not acute. 



Cleavage. — The division of the cells of an embryo. 



Cloaca. — The enlarged portion of the alimentary canal ju.st before the 

 vent. The intestine, the ureters (tubes from the 

 kidneys) and the oviduct open into the cloaca. 



Conjunctiva. — The delicate membrane that lines the eyelids and covers 

 the eyeball in front. 



