Sum it up! What are some important facts about embryology?

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Presentation transcript:

Sum it up! What are some important facts about embryology?

Important Facts About Embryology Taught by Mrs. Ketterer ____________ = a female chicken; makes a ______________ noise _____________ = a male chicken; _____________________________ henclucking rooster crows (cock-a-doodle do)

The _________________ lays the eggs. A hen and rooster _____________ to be together in order to produce an egg. need or do not need A hen ____________ produce an egg without a rooster. can or cannot hen do not need can

In order for a hen to produce an egg, she must be at least ______ months old. It takes about __________ hours and __________ minutes for an egg to form from start to finish. The ______________________ takes the longest to form. It takes about __________ hours! shell 20

The last thing that’s added to the shell before it’s laid is the ____________, which is the _________of the shell. Chicken eggs can be ______________, ______________, ______________, ______________, or _____________. pigment color white brownbluegreenpeach Araucanas

Since chickens do not have hands, they use their _______ to explore things. A chicken cannot bite you because it doesn’t have any ____________. beak teeth

_______________ egg = an egg in which an embryo will grow _______________ egg = the type of egg that you buy at the grocery store; an egg in which no embryo can grow In order for a hen to lay a fertile egg, the hen must mate with a __________. fertile infertile rooster

__________ = the baby chicken growing and developing inside the egg __________= the baby chicken once it makes a hole in shell and hatches It takes _______ days for the embryo to grow and develop into a chick embryo chick 21

Two Types of Incubation: ______________ incubation = a hen sits on the egg to keep it warm ______________ incubation = using an incubator to keep the eggs warm natural artificial

During natural incubation, the hen helps to provide the 4 primary needs of the embryo. The hen provides ___________ by sitting on the eggs. The hen’s body temperature is very hot. Because the eggs are cooler than the air around them, water vapor in the air starts to condense. This creates _________________. The hen also brings back moisture from the grass. The hen provides _________________ by turning the eggs with her feet, beak, or body about 99 times per day. The embryos also need _______________________. The embryos can breathe through tiny holes in the egg shell called __________. There are ____________ to _____________ in each egg shell! heat humidity exercise unpolluted air pores 6,0008,000

The embryo has three sources of food in the egg: 1 - The main source of food is the ________________. It provides the embryo with _________________, _________________, and _________________. yolk vitamins mineralsfat

The embryo has three sources of food in the egg: 2 - The __________________ is also used as a food source for the embryo. There are two layers of albumen, ________________ and _______________. The albumen provides _________________ and ________________. albumen thickthin proteinwater

The embryo has three sources of food in the egg: 3 - The third source of food is the ___________. The embryo gets ______________ from the shell to help build strong ______________________. shellcalcium bones

Toward the end of the 21 days, the egg shell will get ____________ because the embryo is using the _____________ in the egg shell for food. This will help the embryo to get out of the shell once it has developed into a chick. During the 21 days, the egg ______________________ grow in size. does or does not weaker calcium does not

Magic School Bus-Crack a Yolk-Embryology This video approximately 25 minutes viewing time. Show after the first lesson. Great video for grades 3-12 Turn data projector on first Connect your computer to data projector Link: Internet: Type or copy: Magic School Bus Video site: Topic: click on animals Open : click on MSB: “Cracks a Yolk” Click on the triangle to start video Click on the icon: black with 4 arrows: this will enlarge to full screen Jo-Ann Ketterer 4-H Embryology Program Assistant Berks County Agricultural Center 1238 County Welfare Road Suite 110 Leesport, PA FAX: