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CP Exam I > Lectures 1-2 Embryology > Flashcards

Lectures 1-2 Embryology Flashcards

1
Q

how long does it take the blastocyst to implant?

A

2 weeks

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2
Q

How long does it take the blastocyst to reach uterine cavity?

A
  • 5 days
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3
Q

When do trophoblastic cells reach maternal sinusoids?

A

13-14 days

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4
Q

Prechordal plate

A

mesenchyme anterior to the primitive pit that looks like its attached to the notochord (but not) and secretes signaling molecules

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5
Q

AVE

A
  • part of hypoblast on posterior region of prochordal plate

- organizes heart and head region through FGF8 secretion

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6
Q

when does the heart develop (days)? during what stages?

A
  • 21-23 days

- pre-streak and ingression stages

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7
Q

Heart is made from what germ layer (be specific)?

A
  • splanchnic/visceral mesenchyme (mesoderm)
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8
Q

Cells that ingress into streak cranially form _____

  • mid-streak: _____
  • caudally: _____
A
  • outflow tract
  • ventricles
  • atria
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9
Q

The septum transversarium will become what structure?

A

diaphragm

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10
Q

The sinus venosus will become what?

A
  • veins
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11
Q

which transcription factor gives the heart polarity? Where is it secreted from?

A
  • Hand-1

- L heart

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12
Q

What does Aortic arch 1 become?

A
  • maxillary artery
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13
Q

What does Aortic arch 2 become?

A
  • Hyoid artery

- stapedial artery (disappears)

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14
Q

What does Aortic arch 3 become?

A
  • proximal: common carotid

- distal: internal carotid

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15
Q

What does Aortic arch 4 become?

A
  • RIGHT: Proximal R subclavian

- LEFT: Arch of the aorta (medial)

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16
Q

What does Aortic arch 6 become?

A
  • RIGHT: R pulmonary artery

- LEFT: L pulmonary artery, ductus arteriosus

17
Q

What does ventral aorta become?

A
  • cranial arch 3: external carotid
  • btw arches 3 and 4: common carotid
  • btw arches 4 and 6 RIGHT: brachiocephalic
  • btw arches 4 and 6 LEFT: ascending aorta
18
Q

What does the dorsal aorta become?

A
  • cranial arch 3: internal carotid
  • btw arches 3 and 4: disappears
  • btw arches 4 and 6 RIGHT: central R subclavian
  • btw arches 4 and 6 LEFT: descending aorta
  • caudal to arch RIGHT: disappears
  • caudal to arch LEFT: descending aorta

CP Exam I (2 decks)

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