2. Important Facts About Embryology Taught by Mrs. Ketterer
Henclucking____________ = a female chicken; makes a ______________
noiseRooster_____________ = a male chicken; crows (cock-a-doodle
do)_____________________________ 3. henThe _________________ lays
the eggs.A hen and rooster do not need to be together in order to
produce_____________an egg. need or do not needA hen ____________
produce an egg without a rooster.cancan or cannot 4. In order for a
hen to produce an egg, she must be at least ______5-6months
old.24It takes about __________ hours and __________ minutes for
29an egg to form from start to finish.shellThe ___________takes the
longest to form.It takes about ____ hours! 20 5. The last thing
thats added to the shell before its laid is the ____________,
pigmentcolorwhitewhich is the _________of the shell. Chicken eggs
can be ______________,brown bluegreen peach______________,
______________, ______________, or _____________. Araucanas 6.
beakChickens do not have hands, they use their _______ to explore
things.teethA chicken cannot bite you because it doesnt have any
____________. 7. Fertile_______________ egg = an egg in which an
embryo will growInfertile_______________ egg = the type of egg that
you buy at the grocerystore; an egg in which no embryo can growIn
order for a hen to lay a fertile egg, roosterthe hen must mate with
a __________.Male cell joins the femalecell creating a fertile egg.
8. Embryo = the baby chicken growing and developing inside the
egg__________ Chick__________= the baby chicken once it makes a
hole in shell and hatches 21It takes _______ days for the embryo to
grow and develop into a chick 9. Two Types of
Incubation:Natural______________ incubation = a hen sits on the egg
to keep it warmArtificial______________ incubation = using an
incubator to keep the eggs warm 10. During natural incubation, the
hen helps to provide the 4 primaryneeds of the embryo. heatThe hen
provides ___________ by sitting on the eggs.The hens body
temperature is very hot. Because the eggs are coolerthan the air
around them, water vapor in the air starts to condense.
Thishumiditycreates _________________. The hen also brings back
moisture fromthe grass.exerciseThe hen provides _________________
by turning the eggs with herfeet, beak, or body about 99 times per
day. unpolluted airThe embryos also need _______________________.
The embryos canporesbreathe through tiny holes in the egg shell
called __________. There are6,000 8,000____________ to
_____________ in each egg shell! 11. The embryo has three sources
of food in the egg: yolk1 - The main source of food is the
________________. It provides the embryo with vitaminsminerals
fat_________________, _________________, and _________________. 12.
The embryo has three sources of food in the egg:albumen2 - The
__________________ is also used as a food source for the embryo.
thickthin There are two layers of albumen, ________________ and
_______________. Theprotein water albumen provides
_________________ and ________________. 13. The embryo has three
sources of food in the egg: shell calcium3 - The third source of
food is the ___________ . The embryo gets ______________ bones from
the shell to help build strong ______________________. 14.
weakerToward the end of the 21 days, the egg shell will get
____________ becausecalciumthe embryo is using the _____________ in
the egg shell for food. This willhelp the embryo to get out of the
shell once it has developed into a chick. does notDuring the 21
days, the egg ______________________ grow in size. does or does
not
