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The incredible egg

The incredible egg . Ione High School Animal Science Class 2008-2009. What is an egg?. Egg- the female germ cell. The egg becomes the embryo. What then are the eggs in which we see?. Avian egg- bird eggs. It includes the following: Shell Shell membranes Albumen Yolk

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The incredible egg

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  1. The incredible egg Ione High School Animal Science Class 2008-2009

  2. What is an egg? • Egg- the female germ cell. • The egg becomes the embryo.

  3. What then are the eggs in which we see? • Avian egg- bird eggs. • It includes the following: • Shell • Shell membranes • Albumen • Yolk • Together they protect and nourish.

  4. What are the parts of the egg? • From Outside to inside: • Shell- hard outer surface; calcium • Shell has pores to allow loss of CO2, moisture. • Shell membranes- there are two one next to the shell, and surrounding albumen, yolk. • Known as Inner and Outer Membrane • Air Cell- air space between two shell membranes. • Albumen- egg white. • Yolk- true egg, if fertilized become embryo.

  5. Parts of An Egg

  6. How long does it take a hen to lay an egg? • Ovulation- release of mature yolk from the ovary. • Infundibulum- recieves the yolk, about 15 minutes spent. • Yolk moves into magnum 50% of albumen is added. Takes 3 hours. • Spends 1.5 hours in the Isthmus. Shell membranes added.

  7. How long does it take a hen to lay an egg? Continued. • Spends the next 21 hours in the Uterus. • Remainder of albumen is added. • Shell pigment also happens here. • Vagina- the fully formed egg enters cloaca and is hard. • 30 minutes after egg is laid process happens again. • Takes about 24 to 25 hours for chickens.

  8. Female Poultry Reproduction System

  9. How long does it take an egg to hatch? • Species Days to hatching • Chicken 21 • Duck 33-35 • Pheasant 23-25 • Turkey 28 • Geese 29-31

  10. Development of a Chick

  11. What is incubation? • Hatchlings are incubated in captivity. • Artificial means of keeping an egg warm until hatching. • Done in an incubator- artificially heated container. • Still-air incubator- air is not circulated. • Force-air incubator- has a fan to circulate air.

  12. What are the different methods of incubating eggs? • Laying eggs in the incubator and turning them by hand every day. • In vitro- incubating eggs without shell. • The incubator must be kept at a certain temperature range 99 to 103 F.

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