the egg has been called _____ and comes within its own packaging
“the perfect protein”
chickens have been bred and selected to ovulate every ___
27 hours
4 main parts of egg structure
yolk
albumen
membranes
shell
where is yolk made?
liver
what is the yolk production controlled by?
estrogen
contains ____ for chick protection
immunoglobulins
ZW
female
ZZ
male
___ of the female determines the sex of offspring
ovum
a series of individual ova swell with yolk material. one mature ovum is released at ovulation
ovary
this engulfs the released ovum from the body cavity. it is also the site of fertilization of the ova by sperm
infundibulum
a thick albumen is secreted around the yolk
magnum
water fluid is added to the albumen (plumping), then egg shell is slowly deposited around the egg
uterus (shell gland)
semen is stored in tubules and released at ovulation. the musculature controls the time of egg laying
vagina
the vent through which the egg passes as it is laid
cloaca
how long is the egg in the infundibulum?
15 minutes
how long is the egg in the magnum?
3 hours
how long is the egg in the isthmus?
1 1/4 hours
how long is the egg in the uterus (shell gland)?
21 hours
how long is the egg in the vagina?
entire time from ovulation to laying is slightly more than 24 hours
only the left ____ develops, the right regresses at hatch
ovary
the ____ weighs up to 3% of an adult’s body weight
ovary
funnel-shaped structure
infundibulum