1. review emb. facts


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1. review emb. facts

  1. 1. What are some important factsabout embryology?
  2. 2. Important Facts About Embryology Taught by Mrs. Ketterer Hen clucking____________ = a female chicken; makes a ______________ noise Rooster_____________ = a male chicken; crows (cock-a-doodle do) _____________________________
  3. 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. can can or cannot
  4. 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. 5. The last thing that’s added to the shell before it’s laid is the ____________, pigment color whitewhich is the _________of the shell. Chicken eggs can be ______________, brown blue green peach______________, ______________, ______________, or _____________. Araucanas
  6. 6. beakChickens do not have hands, they use their _______ to explore things. teethA chicken cannot bite you because it doesn’t have any ____________.
  7. 7. Fertile_______________ egg = an egg in which an embryo will grow Infertile_______________ egg = the type of egg that you buy at the grocery store; 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 female cell creating a fertile egg.
  8. 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. 9. Two Types of Incubation: Natural______________ incubation = a hen sits on the egg to keep it warm Artificial______________ incubation = using an incubator to keep the eggs warm
  10. 10. During natural incubation, the hen helps to provide the 4 primaryneeds of the embryo. heatThe hen provides ___________ by sitting on the eggs.The hen’s body temperature is very hot. Because the eggs are coolerthan the air around them, water vapor in the air starts to condense. This humiditycreates _________________. 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 can poresbreathe through tiny holes in the egg shell called __________. There are 6,000 8,000____________ to _____________ in each egg shell!
  11. 11. The embryo has three sources of food in the egg: yolk1 - The main source of food is the ________________. It provides the embryo with vitamins minerals fat _________________, _________________, and _________________.
  12. 12. The embryo has three sources of food in the egg: albumen2 - The __________________ is also used as a food source for the embryo. thick thin There are two layers of albumen, ________________ and _______________. The protein water albumen provides _________________ and ________________.
  13. 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. 14. weakerToward the end of the 21 days, the egg shell will get ____________ because calciumthe 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