Term
|
Definition
| a single layer of cells that forms over the yolk at the germinal disc; this is the outer or upper layer |
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Term
| things that develop from the ectoderm |
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Definition
-Skin
-Feathers
-Beak
-Claws
-Eye (Lens, Retina)
-Nervous System
-Mouth, vent lining |
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Term
|
Definition
| an inner layer of cells that develops from a thickening of the Ectoderm |
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Term
| things that develop from the endoderm |
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Definition
- Digestive System
- Respiratory System
- Endocrine System |
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Term
|
Definition
| middle layer of cells that develops in the cavity between the ectoderm and mesoderm |
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Term
| things that develop from the mesoderm |
|
Definition
- Muscles
- Bones
- Blood
- Repro System
- Excretory System |
|
|
Term
|
Definition
| a single layer of cells that forms over the yolk at the germinal disc; this is the outer or upper layer |
|
|
Term
| things that develop from the ectoderm |
|
Definition
-Skin
-Feathers
-Beak
-Claws
-Eye (Lens, Retina)
-Nervous System
-Mouth, vent lining |
|
|
Term
|
Definition
| an inner layer of cells that develops from a thickening of the Ectoderm |
|
|
Term
| things that develop from the endoderm |
|
Definition
- Digestive System
- Respiratory System
- Endocrine System |
|
|
Term
|
Definition
| middle layer of cells that develops in the cavity between the ectoderm and mesoderm |
|
|
Term
| things that develop from the mesoderm |
|
Definition
- Muscles
- Bones
- Blood
- Repro System
- Excretory System |
|
|
Term
|
Definition
-Temperature below which embryo becomes dormant and most development stops
-Temperature above which embryo development activity starts |
|
|
Term
| temperature at which chckens experience physiological zero |
|
Definition
|
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Term
|
Definition
-a circulatory system (driven by the new embryo heart) infused membrane
-When fully developed the Allantois completely surrounds the embryo
-has respiratory, excretory, and digestive functions |
|
|
Term
| respiratory functions of allantois |
|
Definition
| the developing embryo respires (O2 in / CO2 out) but doesn’t have the system to do it, so the Allantois complete gas exchange |
|
|
Term
| excretory functions of allantois |
|
Definition
| it removes waste products from embryonic metabolism |
|
|
Term
| digestive functions of allantois |
|
Definition
| it provides access to both the nutrition in the albumen and calcium in the egg shell |
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Term
|
Definition
-The Amnion forms a sac that fills with fluid in which the embryo floats
-Provides a shock-absorbing environment |
|
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Term
|
Definition
| Covers the yolk and produces an enzyme that converts yolk material into a food source |
|
|
Term
| It takes a chicken ______ days to hatch, but development really takes ______ days, since... |
|
Definition
21
22
some development occurs within the oviduct. |
|
|
Term
| How long does the sperm have to fertilize the ovulated ovum in the infundibulum? |
|
Definition
|
|
Term
| What is the timeframe for the fertilization window in chickens? |
|
Definition
| Fertilization of the germinal disc by the sperm takes place in the infundibulum about 15 minutes after the ovum is released from the follicle. |
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|
Term
| Fertilization of the ______ by the sperm takes place in the infundibulum about 15 minutes after the ovum is released from the follicle. |
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Definition
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|
Term
| Fertilization of the germinal disc by the sperm takes place in the ______ about 15 minutes after the ovum is released from the follicle. |
|
Definition
|
|
Term
| Fertilization of the germinal disc by the sperm takes place in the infundibulum about ______ after the ovum is released from the follicle. |
|
Definition
|
|
Term
| Fertilization of the germinal disc by the sperm takes place in the infundibulum about 15 minutes after... |
|
Definition
| the ovum is released from the follicle. |
|
|
Term
| After fertilization, when does cell division start? |
|
Definition
| starts about ~3 hours + after fertilization |
|
|
Term
| Where in the oviduct does cell division start? |
|
Definition
| starts in isthmus and continues while the egg passes along the oviduct |
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Term
| After the ovum has been fertilized it is now called a ______, which has all 78 chromosomes. |
|
Definition
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|
Term
| After the ovum has been fertilized it is now called a zygote, which has all ______ chromosomes. |
|
Definition
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|
Term
| What is the optimal temperature for development to occur during incubation? |
|
Definition
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|
Term
| What happens at day 3 of embryonic development? |
|
Definition
| heart beats, blood vessels visible |
|
|
Term
| What happens at day 6 of embryonic development? |
|
Definition
| Appearance of beak and voluntary movement |
|
|
Term
| What happens at day 8 of embryonic development? |
|
Definition
|
|
Term
| What happens at day 12 of embryonic development? |
|
Definition
|
|
Term
| What happens at day 13 of embryonic development? |
|
Definition
|
|
Term
| What happens at day 14 of embryonic development? |
|
Definition
| Embryo turns with head towards large end of egg |
|
|
Term
| What happens at day 20 of embryonic development? |
|
Definition
| Embryo is now breathing and punctured air cell |
|
|
Term
| What happens at day 21 of embryonic development? |
|
Definition
|
|
Term
heart beats, blood vessels visible
Which stage of embryonic development? |
|
Definition
|
|
Term
Appearance of beak and voluntary movement
Which stage of embryonic development? |
|
Definition
|
|
Term
Feather tracts seen
Which stage of embryonic development? |
|
Definition
|
|
Term
first visible feathers
Which stage of embryonic development? |
|
Definition
|
|
Term
Appearance of scales
Which stage of embryonic development? |
|
Definition
|
|
Term
Embryo turns with head towards large end of egg
Which stage of embryonic development? |
|
Definition
|
|
Term
Embryo is now breathing and punctured air cell
Which stage of embryonic development? |
|
Definition
|
|
Term
pipping
Which stage of embryonic development? |
|
Definition
|
|
Term
|
Definition
| cracking the shell of an egg |
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