Reading...
Play button
Play button
Use LEFT and RIGHT arrow keys to navigate between flashcards;
Use UP and DOWN arrow keys to flip the card;
H to show hint;
A reads text to speech;
31 Cards in this Set
- Front
- Back
|
Folding in which plane results in the head-to-tail fold?
|
medial plane
|
|
|
Growth of what structure causes the head fold?
|
Growth of the neural tube/ fore brain causes head folding
|
|
|
Growth of the neural tube causes which fold?
|
growth of the neural tube/ the spinal cord
|
|
|
Before the head fold, the brain is caudal to the oropharyngeal membrane. As the brain grows cranially, it overhangs the developing heart, pushing the heart, pericardial cavity and septum transversum onto which surface of the embryo?
|
Ventral surface
|
|
|
Prior to the head fold, what is the orientation of the septum transversum in relation the heart?
|
the septum transversum is cranial to the heart but due to folding it comes to lay caudal to the heart. Eventually the septum transversum becomes the central tendon of the diaphramn it develops first during week 3
|
|
|
After the head fold, what is the orientation of the septum transversum in relation the heart?
|
caudal to the heart
|
|
|
What muscle develops in part from the septum transversum?
|
part of the yolk sac becomes incorperated into the septum transversum this part eventually forms the forgut. This part of the forgut eventually becomes the esophagus and the respiratory portion
|
|
|
The foregut develops in part from contribution of which extraembryonic structure?
|
yolk sac--During embryonic folding the yolk sac becomes pinched into a gut tube
|
|
|
As a result of the caudal fold, the tail region projects over which membrane?
|
cloacal membrane, yolk sac incorperated between this area becomes the hindgut
|
|
|
Part of the yolk sac becomes incorporated as hindgut, and its terminal part dilates to form _________________.
|
the cloaca--this gets seperated by the urorectal septum forming the urogential region and the the rectum
|
|
|
The tail fold causes the allantois to become partially incorporated into the embryo as the connecting stalk attaches to which embryonic surface?
|
ventral surface
|
|
|
Folding in the horizontal plane is due to the growth of somites. What is this kind of folding called?
|
lateral folding
|
|
|
As a result of folding in the horizontal plane, part of the yolk sac becomes incorporated as midgut and the yolk sac remains attached to the midgut by what narrow structure?
|
yolk sac--this becomes part of the umbilical cord with the somatic mesoderm and the anmion
|
|
|
After folding, the region of attachment of amnion to the ventral surface of embryo is reduced to a narrow region that is the future site of what structure and what makes it epithial lining?
|
umbilical cord/ amnion
|
|
|
The amniotic cavity expands and obliterates the space formerly called the extraembryonic coelom. What is this space called?
|
choronic cavity
|
|
|
The amnion forms the epithelial lining of what structure?
|
umbilical cord
|
|
|
NAME THAT GERM LAYER:
|
|
|
|
Choices: Ectoderm, Lateral Mesoderm, Intermediate Mesoderm, Paraxial Mesoderm, or Endoderm.
|
|
|
|
Becomes CNS, PNS and sensory epithelia of eye.
|
Neural ectoderm
|
|
|
Becomes epithelia of trachea, bronchi and lungs.
|
endoderm
|
|
|
Becomes spinal, cranial and autonomic ganglia and nerves.
|
ectoderm-->neural crest cells
|
|
|
Becomes body cavities.
|
lateral mesoderm
|
|
|
Becomes blood and lymph cells and vessels, spleen and adrenal cortex.
|
lateral mesoderm
|
|
|
Becomes ear, nose, epidermis, hair and nails.
|
ectoderm
|
|
|
Becomes urogenital system.
|
intermediate mesoderm
|
|
|
Becomes skeletal muscles and appendicular skeleton.
|
paraxial mesoderm
|
|
|
Becomes urachus.
|
endoderm
|
|
|
Becomes urinary bladder, GI epithelia, liver and pancreas.
|
endoderm
|
|
|
Becomes epithelia of pharynx, thyroid, tympanic cavity and parathyroid gland.
|
endoderm
|
|
|
Becomes mammary glands, pituitary glands, meninges and pineal body.
|
neral tube<--ectoderm
|
|
|
Becomes skull at head fold.
|
lateral at head fold
|
