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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 diagram Back copy
”Ticket out the door” SWBAT: recall from power point lesson Can be used as a quiz
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The QuestionBIG
What are the main parts of an egg and
their functions?
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Turn to your partner and share one fact you learned about the egg that you did not know before.
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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.
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shell
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Function: the outer shell membrane and inner shell membrane protects the embryo by keeping out germs and keeping in
moisture.
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shell
shell membrane outer & inner
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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.
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shell
shell membrane outer and inner
air cell
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Function: the albumen is food for the embryo. It provides the embryo with protein and water.
This is a 16 day food supply.
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shell
shell membrane outer and inner
air cell albumen
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Function: the chalazae are two twisted cords that anchor (hold) the yolk in the middle of the egg.
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shell
shell membrane outer and inner
air cell albumen
chalazae
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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.
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shell
shell membrane outer and inner
air cell albumen
chalazaeyolk
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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
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shell
shell membrane outer and inner
yolk
germinal spot
blastodisc= infertile One parental cell(female)
blastoderm=fertileTwo parental cells(male & female)
chalazae
albumenair cell
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A
B
C
D
E
F
G
H
I
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Ticket Out the Door
Label the parts of an egg
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Name___________________
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Name:____________________