Podcast
Questions and Answers
What is the main cause of cephalocaudal folding in the embryo?
What is the main cause of cephalocaudal folding in the embryo?
- Amniotic cavity
- Yolk sac
- Connecting stalk
- Lengthening of the neural tube (correct)
Which structure causes the head and tail regions of the embryo to move ventrally during cephalocaudal folding?
Which structure causes the head and tail regions of the embryo to move ventrally during cephalocaudal folding?
- Amniotic cavity
- Neural tube (correct)
- Yolk sac
- Allantois
During which stage does the embryo curve into the fetal position due to cephalocaudal folding?
During which stage does the embryo curve into the fetal position due to cephalocaudal folding?
- 24 days (correct)
- 22 days
- 17 days
- 12 days
What is the role of lateral folding in the embryonic development?
What is the role of lateral folding in the embryonic development?
Which membrane is affected by cephalocaudal folding?
Which membrane is affected by cephalocaudal folding?
Flashcards
Cephalocaudal folding
Cephalocaudal folding
The process where the embryo's head and tail regions bend towards its belly.
Neural tube
Neural tube
The lengthening of this tube causes the head and tail to move towards the belly during cephalocaudal folding.
Fetal position
Fetal position
This is when the embryo curves into a C shape due to cephalocaudal folding.
Lateral folding
Lateral folding
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Oropharyngeal membrane
Oropharyngeal membrane
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Study Notes
Cephalocaudal Folding
- Main cause of cephalocaudal folding in the embryo: growth and rapid proliferation of cells in the germ layers
- Structure responsible for ventral movement of head and tail regions: notochord
Embryonic Development
- Cephalocaudal folding leads to the embryo curving into the fetal position during the late embryonic stage (around 8 weeks)
Lateral Folding
- Role of lateral folding in embryonic development: formation of the embryonic axes (anteroposterior, dorsoventral, and lateral) and establishment of the body shape
Affected Structures
- Membrane affected by cephalocaudal folding: amnion
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Description
Learn about the folding of the embryo and the derivatives of the endoderm in the embryonic period (3rd to 8th week) through this lecture. Understand the dorsal and ventral aspects of the embryo, as well as the development of the amniotic cavity and yolk sac.
