Egg Parts
infertile
an egg that is not fertilized and will not hatch
broody
characteristic of a hen that wants to sit on eggs and hatch them, through hormonal changes she has ceased to lay and developed maternal instincts
air sacs
elastic structures connected to the bird lungs that draw air through the lungs. birds have two sets of air sacs caudal air sacs and cranial air sacs that inflate or deflate according to muscle movement in the birds chest.
cartilage
elastic tissue which composes most of the skeleton of young vertebrate embryos and is then mostly converted to bone.
vagina
the final section of the oviduct connected to the cloaca in which the cuticle or bloom on a egg is added and where the eggs are turned so that the long axis is laid first
earlobes
the fleshly patch of bare skin below the ears
comb
the fleshly, red outgrowth on top of a chicken's head. There are eight types of combs.
wattles
the fleshy, red growths that hang from the side and base of the chickens beak
avian egg
a bird egg composed of the shell, shell membranes, albumen, and the yolk containing the true egg or ovum
oxygen
a colorless odorless gas that is found in the sir and is essential to life
blastoderm
a fertilized true egg from which the embryo developes
breed
a group of birds the have the same physical features such as body shape or type, color, number of toes, feathered or non-feathered shanks(legs) and carriage or station
class
a group of chicken breeds from the same geographical origin or showing similar characteristics
organ
a group or cell and tissues that perform a specialized body function such as a heart
carbon dioxide
a heavy colorless gas that is formed in respiration, combustion and decomposition of organic substances
hock
a joint in the leg of animals
chorion
a membrane surrounding both the yolk sac and the albumen that fuses with the allantois
bantam
a miniature chicken,one third to one fifth the size of a standard chicken
amnion
a sac filled with fluid that surrounds the embryo and protects it from injury.
allantois
a sac-like external organ located under the egg shell that obtains oxygen, nourishment, and calcium from the egg; and in which is deposited the embryo's waste products.
cuticle
a secretion of the uterus consisting mainly of protein that serves to partially seal the pores of the egg shell and acts as a lubricant when the egg is laid.
bone marrow
a soft tissue that fills the cavity of the most bones and produces blood cells
variety
a subdivision of a breed. different characteristics include feather color, comb type and the presence of a beard
germinal disk
a true egg that had not been fertilized
relative humidity
amount of moisture contained in the air compared with the amount that the air could contain at a particular temperature. it is expressed as a percentage
gizzard
an internal organ of birds made of thick muscles which crushes and grinds food by muscular action and with pebbles or grit
hemogloblin
an iron containing chemical of red blood cells that carries oxygen from the lungs to body tissue
yolk sac
membrane that surrounds the yolk and connects it to the embryos body also called vitelline membrane. the portion of the unused yolk drown into the chick before hatching
extraembryonic membranes
membranes outside the embryos body that provide respiration, nutrition, excretion, and protection. they include the yoke sack, amnion, choriom and allantois
sperm
microscopic reproductive cell of a male; the male germ cell
alveoli
millions of tiny balloon-like cells which form the lungs and expand or contract with breathing
humidity
moisture in the air
nutrient
nourishing substance or ingredient
circulatory
of or relating to the system of blood vessels, blood and heart concerned with the blood circulation
avian
of, relating to, or characteristic to birds
ventricle
one of the chambers of the heart which receives blood from the atrium of the same side ad pumps it to the arteries
atrium
one of the chambers of the heart which receives blood from the veins. plural atria
abdomen
part of the body between the chest and the legs
shank
part of the leg between the knee and ankle or a corresponding part in animals
porous
permeable to fluids due to thousands of pores or minute openings in the eggshell through which gases are exchanged
ossification
process by which bones become hardened
pneumatized
relating to bird bones containing air sacs which are by wing movement to make the bird light enough to fly
cell
smallest unit of living matter capable of functioning on its own
down
soft, fine hairlike feathers on young birds
air cell
the air space between the two shell membranes, usually in the large end of the egg.
fertile
the capability of an egg to develop into a chick
fetus
the chick during the later development stages in the egg
embryo
the early stage in development of the chick within the egg
oviduct
the female bird organ which puts the albumen, shell membranes, and shell around the yolk
ovum
the female germ cell or true egg; plural form is ova
ovary
the female organ that holds the true eggs cells and produces the yolks.
plasma
the fluid part of the blood
egg
the microscopic reproductive cell of the female; the true egg or ovum. also see avian egg
incubation
the process of applying heat to eggs and causing them to hatch
metabolic rate
the rate of the process by which a substance is handled in the body
ovulation
the release of a true egg or ovum from a follicle in the ovary
oviposition
the release of an avian egg from the oviduct
folicule
the sack in which an ovum and its yolk are held until the yolk matures and is released
magnum
the section of the oviduct between the infundibulum and isthmus where the thick white of an egg is formed
isthmus
the section of the oviduct following the magnum; it form the inner and outer shell membrane of the egg
uterus
the section of the oviduct next to the isthmus that secretes a portion of the albumen and all of the shell and shell pigment
embryolgy
the study of the formation and development of embryos
chick tooth
the tiny, horny projection on the top of the chicks beak which it uses to peck holes in shell when hatching
chalazae
the two whitish cords attached to the yolk of an egg which hold the yolk in the cent of the albumen. singular form chalaza
fertilization
the union of a male reproductive cell with a female reproductive cell
infundibulum
the upper, funnel end of the oviduct that picks up the yolk after its release from the ovary and where fertilization takes place
cloaca
the vent or common opening in birds through which the digestive, urinary, and reproductive tract empty
albumen
the white of an egg,consisting of outer thin, firm, inner thin, and chalaziferous layers
pip
to break through or peck holes in the shell by chick
hatch
to come out of the shell for a chick
set
to put eggs under a broody hen or in a incubator to hatch them
candle
to shine a bright light through the shell to observe development inside the egg
shell membranes
two then membranes next to the shell and surrounding the albumen and yolk, known as inner and outer shell membranes. they are one of the eggs main defenses against bacterial invasion
osteocytes
type of bone cell which is responsible for carrying nutrients to the bones.
osteoblasts
type of bone cell which is responsible for making the structure and laying in the minerals
osteoclasts
type of bone cell which is responsible for shaping the bones as they grow