how are birds adapted for reproduction? a close look at the chicken egg
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How are birds adapted for reproduction? A close look at the chicken egg. Birds. What you know: Fertilization occurs … INTERNALLY Development occurs … EXTERNALLY (outside of mother’s body) The avian egg contains everything that the developing embryo needs FOOD = Yolk - PowerPoint PPT PresentationTRANSCRIPT
How are birds adapted for reproduction?
A close look at the chicken egg
Birds
What you know:• Fertilization occurs …
INTERNALLY
• Development occurs …EXTERNALLY
(outside of mother’s body)
The avian egg contains everything that thedeveloping embryo needs
FOOD = YolkOXYGEN = Shell Pores
PROTECTION = Shell and Amniotic Fluid
Chicken Reproduction
Hen x Rooster ↓
Fertilized Egg(embryo)
Hen x no Rooster↓
Unfertilized Egg($2.19/dozen)
Position of Ovary in A Hen
Egg FormationOvary produces
Ovum surrounded by Yolk
↓
Infundibulum
(catches yolk)
↓
Oviduct
↓
Uterus
↓
Vagina
↓
Vent
↓
Ovum with Shell
(24 hours after yolk released)
The Incredible Edible Egg
The Fertilized Egg
On Day 21…
And Now…
• Watch Film
• Take Notes
• Answer Questions
Tomorrow…DISSECTION!!
