Embryology Flashcards

1
Q

What is the name of the connective tissue present in the embryo?

A

Mesenchyme

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
2
Q

Describe the formation of the Neural tube

A
  • Blastula forms
  • Inner cell mass forms bilaminar disc
  • Notochord forms, giving the trilminar disc an axis
  • Notochord makes the ectoderm thicker and causes an invagination which we call the neural groove
  • Neural groove migrates further diwn and separates from the ectoderm, forming the neural tube
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
3
Q

What are somites derived from?

A

The paraxial mesoderm

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
4
Q

How many branchial arches are formed?

A

5
1,2,3,4,6
(5 starts forming then disappears)

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
5
Q

Which nerve is formed by the first branchial arch?

A

Mandibular branch of the trigeminal nerve

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
6
Q

Which nerve is formed by the second branchial arch?

A

Facial nerve

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
7
Q

Which nerve is formed by the third branchial arch?

A

Glossopharyngeal nerve

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
8
Q

Which arch is formed by the fourth branchial arch?

A

Superior laryngeal branch of the vagus nerve

Muscles of vocal cords

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
9
Q

Which nerve is formed from the sixth branchial arch?

A

Recurrent laryngeal branch of the vagus nerve

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
10
Q

Which aspects of the skeleton are formed from the first branchial arch?

A

Mandible
Malleus
Incus

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
11
Q

Which aspects of the skeleton are formed from the second branchial arch?

A

Part of the hyoid bone
Stapes
Styloid process

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
12
Q

Which aspects of the skeleton are formed from the third branchial arch?

A

Part of the hyoid bone

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
13
Q

Which aspects of the skeleton are formed from the fourth branchial arch?

A

Upper bit of thyroid cartilage

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
14
Q

Which aspects of the skeleton are formed from the sixth branchial arch?

A

Lower bit of thyroid cartilage

Cricoid cartilage

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
15
Q

What results in a cleft lip?

A

Facial processes not fusing

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
16
Q

What are fontanelle?

A

Membranous gaps between skull bones

17
Q

What is the function of the fontanelle?

A

Allow some flexibility in the skull for birthing

May cause misshapen skull if they fuse too early