GLOSSARY

Absorptive: the process of taking in liquid.

Adoption: to take as one’s own

Air Cell: acts as a shock absorber during early development of the embryo.

Albumen: the white of the avian egg.

Allantois A thin membrane attached to the embryo, which forms a sack. It collects waste from the embryo, which is produced from the kidneys. After the chick hatches, the allantois is left behind as a solid bag of uric acid crystals.

Amnion The sac in which the embryo is suspended.

Avian Egg: the mass of material in a bird (Aves) Egg – the shell, shell membranes, albumen and yolk – which are designed by nature to nourish and protect the true egg.

Blastoderm: fertilized true egg, which is beginning to develop into an embryo.

Blastodisc: a true egg which was not fertilized.

Breeder: one who raises a group of animals within a species.

Brooder: a heated structure for raising young chicks.

Candle: to examine eggs by holding them up to a bright light (candler).

Cause: a person or thing that produces a result.

Chalazae: two white cords holding the yolk in the center of the albumen.

Cloaca: the event or opening of the oviduct through which the avian egg is laid.

Condition: a particular state of a person or thing.

Differentiation: to make a distinction.

Egg: microscopic cell of the female – the true egg.

Egg tooth: used by the chick to crash through the shell wall. This tooth is then lost a couple days after coming out of the shell.

Embryo: an organism in its early states of its development.

Embryology: the science dealing with the development of embryos.

Fertilization: union of a male with a female cell.

Habitation: a place of residence.

Hatching: to bring forth from an egg.

Humidity: humid condition filled with water vapor.

Incubation: providing favorable conditions for hatching.

Infertile embryo: undeveloped embryo.

Infundibulum: the funnel end of the oviduct which picks up the yolk when it is released from the ovary. The area in which fertilization takes place.

Insulation: to cover with non conducting material to prevent or reduce the transfer of heat.

Observe: to evaluate.

Ovary: the organ of the female which holds the true eggs and produces the yolks on which the true eggs are located.

Oviduct: organ of the female which puts the albumen, shell membranes, and the shell of the avial egg around the yolk.

Properties: an essential or distinctive trait or characteristic of a living or non living thing.

Shell: the hard outer surface of an avian egg.

Shell membranes: two membranes which are next to the shell and surround the albumen and yolk.

Sperm: microscopic cell of the male.

Strategy: a detailed plan for reaching a goal.

Succeed: to accomplished what was attempted or intended.

Temperature: the measure of warmth or coldness of an object or substance.

Ventilation: to provide with fresh air.

Yolk: the round orange – yellow mass upon which the true egg is located.

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