4 H Embryology Week 2 4 H Pledge

4 -H Embryology Week #2

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.

Shell Albumen Outer Shell Membrane Chalazae Inner Shell Membrane Yolk Air Cell Blastodisc = Food Source

Thick Albumen Thin Albumen Chalazae Shell Blastodisc Yolk Page 5 (Read Pg 3)

HOMEWORK Which egg is 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

3/21/11 20 4/8/11 4/11/11 Page 11

The color of the shell is white. X X Complete Sentences! Spelling Always Counts! X

Complete Sentences! Spelling Always Counts! Page 12

Individual Egg Progress

Temporary Organ Sheet (tan) Internal = ? External = ?

Temporary Organ Sheet (tan) Internal = inside External = outside

Temporary Organ Sheet (tan) Temporary = ?

Temporary Organ Sheet (tan) Temporary = for a short time, not forever, not permanent

Temporary Organ Sheet (tan) Organ = ?

Temporary Organ Sheet (tan) Organ = a group of tissues which perform a certain task.

Temporary Organ Sheet (tan) Temporary Organ = a group of tissues performing a certain task for a short period of time Is a temporary organ internal or external to an embryo’s body?

Egg tooth Temporary Organs Two Functions Waste receptacle Respiration (lungs) Protection -Calcium 19 21 Food source 16 day supply 3 day air supply Protection Main food source 21 day supply

What did you see when you candled on Day #4? Page 13 Scientific Drawing: Yolk = dark orange Albumen = light yellow Embryo = red Blood vessels = red Air cell = white (penny – nickel size)

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11 Skin pores are visible! Homework Pg 6 - Read and complete Pg 11/12 Answer questions Pg 12 - Chart (fertile/infertile) Page 15 Temp. Organ Sheet (tan)- Read the back Pg 13 - Scientific Drawing Shell Eye Spot Air Cell 11 Albumen Embryo Blood Vessels Yolk Page 13