Peggy and giovanna 3.9

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Peggy and giovanna 3.9

  1. 1. Life Cycle of a Chicken By Peggy and Giovanna of Pri 3.9
  2. 2. Life Cycle of a Chicken <ul><li>In nature, a female chicken selects the nest site and lays a clutch of eggs. A chicken egg starts as an egg yolk inside the hen. A yolk is produced by the hen’s ovary in a process which is called ovulation. The yolk is released into the oviduct, where it can be fertilized internally by a sperm. The yolk continues down the oviduct and is covered with a membrane, structural fibers, and layers of albumin which is the egg white. This part of the oviduct is called the magnus. The shell is made of calcite, a crystalline form of calcium carbonate. The embryo grows inside the egg for 21 days, until the chick pecks its way out. </li></ul>
  3. 3. Stages in its Life Cycle
  4. 4. Hatching Eggs <ul><li>The rooster must be present for an egg to be fertilized. Most eggs that you buy at the supermarket are from hens that are raised a rooster. </li></ul>
  5. 5. Inside a Chicken Egg           Shell Germinal Disc Chalaza Air Cell Yolk Thick Albumin
  6. 6. Inside a Chicken Egg <ul><li>Mission #3 </li></ul>Day 1 Day 6 Day 13 The zygote divides and begins to grow. The beak becomes visible. Fingers of the wings are covered with feather papillae.
  7. 7. From Egg to Chick <ul><li>Mission #4 </li></ul>Day 17 Day 21 The beak turns towards the air cell. The chick has hatched!
  8. 8. Hear from the EGGxperts... <ul><li>What have you learnt? What was most interesting? </li></ul><ul><li>What was challenging for you and your partner? </li></ul><ul><li>I have learnt to cooperate with my partner. The most interesting part was when I copied and pasted the pictures. The most challenging part was when we had to finish our work on time. </li></ul>
  9. 9. Websites Used <ul><li>http://chickscope.itg.uiuc.edu/explore/embryology/day17/ http://www.sites.ext.vt.edu/virtualfarm/poultry/poultry_incubation.htm </li></ul><ul><li>http://www.google.com.sg/ </li></ul><ul><li>http://www.enchantedlearning.com/subjects/birds/info/chicken.shtml </li></ul>
  10. 10. Thank you!

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