Chick Embryo Development: Feather Growth and Preparation for Hatching (Part 4)
Explore “Feather Growth and Preparation for Hatching” in this Chick Embryo Development lesson. Part 4 of the five-part series brings together the source material and lesson topics. Use the contents links to find a section, read the notes, and consult the complete original teaching slides below.
Lesson topics
- Feather follicles surround the external auditory meatus and cover the upper eyelid.
- The allantois shrinks to become the chorioallantoic membrane.
- Down covers almost the whole body and grows rapidly.
- DAY 15 & 16:
- The embryo’s renal system produces urates.
Contents
- Read the original document
- Feather follicles surround the external auditory meatus and cover the upper eyelid.
- The allantois shrinks to become the chorioallantoic membrane.
- Down covers almost the whole body and grows rapidly.
- DAY 15 & 16:
- The embryo’s renal system produces urates.
- Onset of vitellus internalization.
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Read the original source document
Chick Embryo Development – Fertilized and Unfertilized Eggs: original teaching slides for this study series.
Feather follicles surround the external auditory meatus and cover the upper eyelid.
Feather follicles surround the external auditory meatus and cover the upper eyelid. The lower eyelid covers two thirds, or even three quarters, of the cornea. GURRAM SRINIVAS
The allantois shrinks to become the chorioallantoic membrane.
The allantois shrinks to become the chorioallantoic membrane. Appearance of claws and leg scales. GURRAM SRINIVAS
Down covers almost the whole body and grows rapidly.
Down covers almost the whole body and grows rapidly. GURRAM SRINIVAS
DAY 15 & 16:
DAY 15 & 16: Few morphological changes: chick and down continue to grow. Vitellus shrinking accelerates. Progressive disappearance of the egg white. The head moves toward pipping position, under the right wing. GURRAM SRINIVAS
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The embryo’s renal system produces urates.
The embryo’s renal system produces urates. The beak, which is under the right wing, points to the air cell. The egg white is fully resorbed. GURRAM SRINIVAS
Onset of vitellus internalization.
Onset of vitellus internalization. Reduction in the amount of amniotic fluid. This is the time for transfer from incubator to hatcher, and also perhaps in ovo vaccination. GURRAM SRINIVAS
Review questions and answers
What are the key points about Feather follicles surround the external auditory meatus and cover the upper eyelid.?
Feather follicles surround the external auditory meatus and cover the upper eyelid. The lower eyelid covers two thirds, or even three quarters, of the cornea. GURRAM SRINIVAS
What are the key points about The allantois shrinks to become the chorioallantoic membrane.?
The allantois shrinks to become the chorioallantoic membrane. Appearance of claws and leg scales. GURRAM SRINIVAS
What are the key points about Down covers almost the whole body and grows rapidly.?
Down covers almost the whole body and grows rapidly. GURRAM SRINIVAS
What are the key points about DAY 15 & 16:?
DAY 15 & 16: Few morphological changes: chick and down continue to grow. Vitellus shrinking accelerates. Progressive disappearance of the egg white. The head moves toward pipping position, under the right wing. GURRAM SRINIVAS
What are the key points about The embryo’s renal system produces urates.?
The embryo’s renal system produces urates. The beak, which is under the right wing, points to the air cell. The egg white is fully resorbed. GURRAM SRINIVAS
More lessons from this document
- Chick Embryo Development – Fertilized and Unfertilized Eggs — Part 1
- Chick Embryo Development – Fertilized and Unfertilized Eggs — Part 2
- Chick Embryo Development – Fertilized and Unfertilized Eggs — Part 3
- Chick Embryo Development – Fertilized and Unfertilized Eggs — Part 4
- Chick Embryo Development – Fertilized and Unfertilized Eggs — Part 5
Conclusion
The important points in The embryo’s renal system produces urates. should be reviewed alongside the definitions, examples and comparisons given above. Continue with the other four articles to cover the rest of the source material.