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The Question

hammett-bentley
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The Question

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  1. Teachers to utilize this power point Please do the following: 1. Each student will need a copy of slides 22-23 (print on front/back) 2. Slide 23: Students will work on embryology terms in class. Front side 3. Slide 22: Students will label the egg diagramBack copy”Ticket out the door” SWBAT: recall from power point lesson Can be used as a quiz

  2. BIG The Question What are the main parts of an egg and their functions?

  3. Turn to your partner and share one fact you learned about the egg that you did not know before.

  4. shell Function: the shell protects the embryo and provides calcium for strong bones. The shell is porous; it has 6,000-8,000 pores (microscopic holes) allowing the transfer of oxygen, carbon dioxide, humidity and germs into and out of the egg.

  5. shell

  6. shell membrane Function: the outer shell membrane and inner shell membrane protects the embryo by keeping out germs and keeping in moisture.

  7. outer & inner shell membrane shell

  8. air cell Function: the air cell is a 3-day supply of air for the embryo from day 19-21. This is where the chick will take its first breath. It is a shock absorber or cushion for the embryo. The air cell increases in size with age.

  9. outer and inner shell membrane air cell shell

  10. albumen Function: the albumen is food for the embryo. It provides the embryo with protein and water. This is a 16 day food supply.

  11. outer and inner shell membrane albumen shell air cell

  12. chalazae Function: the chalazae are two twisted cords that anchor (hold) the yolk in the middle of the egg.

  13. chalazae outer and inner shell membrane albumen shell air cell

  14. yolk Function: the yolk is the main source of food for the embryo. The yolk provides the embryo with vitamins, minerals, and fat. The yolk is a 21 day supply of nutrients.

  15. yolk chalazae outer and inner shell membrane albumen shell air cell

  16. germinal spot Function: the germinal spot is where the embryo begins to grow and develop. Two parental cells (male and female) Blastoderm = fertile contains both male and female cells. Blastodisc=infertile contains one female cell

  17. yolk chalazae outer and inner germinal spot shell membrane blastoderm=fertile Two parental cells (male & female) blastodisc= infertile One parental cell (female) albumen air cell shell

  18. F A D B E I H C G

  19. Ticket Out the Door Label the parts of an egg

  20. Name___________________

  21. Name:____________________

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