4-H Embryology Penn State 4-H Responsibility!.

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Presentation transcript:

4-H Embryology Penn State 4-H Responsibility!

4-H Pledge I pledge my Head to clearer thinking my Heart to greater loyalty my Hands to larger service and my Health to better living for my club, my community my country and my world.

What is Embryology? Embryo + ology

Embryology = the study of the beginning of life of any living thing What is Embryology? Embryology = the study of the beginning of life of any living thing

Let’s talk about chickens…

Rooster = Male Hen = Female

5-6 months old Albumen Pigment How long to make an egg? Green Notebook Page 6

That’s the hen, what about the rooster? The hen produces this egg independently. This egg has hen cells only. This egg will not develop an embryo. This is the type of egg you buy at the grocery store. This egg is INFERTILE. H When hens and roosters are together they mate and the hen produces this egg. This egg has hen and rooster cells. This egg will develop an embryo. This is the type of egg in the incubator. This egg is FERTILE. H R

Shell Outer Shell Membrane Inner Shell Membrane Air Cell Albumen Chalazae Yolk Small, white Blastodisc -Infertile Blastoderm - Fertile 4 x larger, tan, circle Page 4

Incubation Natural Incubation: the hen sits on the eggs until they hatch. Artificial Incubation: use an incubator and copy the hen’s actions until the eggs hatch. 4 Components of Incubation: Temperature Humidity Exercise Clean, fresh air Page 3

Page 7

Candling Day 4 embryo

4 The embryo looks like a spider. Label: Air Cell Embryo Blood Vessels Yolk Albumen Shell Page 13

The embryo looks like a spider. 4 The embryo looks like a spider. Homework: Page 3-reading Page 4-bottom Page 5-top Page 13-drawing Shell Air Cell Yolk Embryo Albumen Blood Vessels Page 13