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

The QuestionBIG

What are the main parts of an egg and

their functions?

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

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.

shell

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

moisture.

shell

shell membrane outer & inner

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.

shell

shell membrane outer and inner

air cell

Function: the albumen is food for the embryo. It provides the embryo with protein and water.

This is a 16 day food supply.

shell

shell membrane outer and inner

air cell albumen

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

shell

shell membrane outer and inner

air cell albumen

chalazae

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.

shell

shell membrane outer and inner

air cell albumen

chalazaeyolk

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

shell

shell membrane outer and inner

yolk

germinal spot

blastodisc= infertile One parental cell(female)

blastoderm=fertileTwo parental cells(male & female)

chalazae

albumenair cell

A

B

C

D

E

F

G

H

I

Ticket Out the Door

Label the parts of an egg

Name___________________

Name:____________________