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. Page 19

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

Pages 5-6 Key words: Ovary Oviduct Pigment How long does it take for a hen to make and egg?

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 The hen and rooster mate. Parent cells unite inside the hen. The fertile egg is formed.

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

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

Candling

Page7

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

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