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Semester 5 November > Embryology > Flashcards

Flashcards in Embryology Deck (51)
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Neural crest cells can produce

Cranial and sensory ganglia
Adrenal medulla (chromaffin cells)
Melanocytes
Branchial arch cartilage
Parasympathetic plexus in gut
C cells of thymus
Bulbar and Conan ridges of heart
Schwann cells
Arachnoid and pia mater

1

Name of arch 1

Meckel's

2

Name of arch 2

Reichert's

3

Cartilage in arch 1 forms

Malleus and incus

4

Cartilage in arch 2 forms

Stapes and stylus
lesser horn and body of hyoid

5

Cartilage of arch 3 forms

Greater horn and body of hyoid

6

Cartilage of arches 4 and 6 form

Larynx

7

Nerve supply to Branchial arches 1,2,3,4&6

V3, VII, IX, X

8

Muscles formed by arch 1

Mastication
Mylohyoid
Half digastric
Tensor tympani
Tensor palatini

9

Muscles formed by arch 2

Facial expression
Stapedius
Stylohyoid
Half digastric

10

Muscles formed by arch 3

Stylopharngeus

11

Muscles formed by arches 4&6

Pharynx
Larynx
Levator of palate
Oesophagus

12

Structure formed by pouch 1

Auditory tube

13

Structure formed by pouch 2

Palatine tonsil

14

Structure formed by pouch 3

Parathyroid gland
Thymus

15

Structure formed by pouch 4

Parathyroid gland
Ultimo-brachial body (C cell of thyroid)

16

Structure formed by first dorsal cleft

External auditory meatus

17

Describe basic development of thyroid

Down growth from tongue (ant 2/3 and post 1/3 junction) thyroid diverticulum
Foramen cecum formed on tongue
Thyroglossal duct from foramen cecum to thyroid

18

Anterior 2/3 of tongue formed by arch?

1

19

Nerve supply to anterior 2/3 of tongue

Motor -XII
General sensory - V3
Special sense - VII

20

Nerve supply to posterior 2/3 of tongue

Motor - XII
General sensation - IX
Special sense - IX

21

Remnant of notochord in adult

Nucleus pulposis of intervertebral disk

22

Part of somites that forms vertebral column

Sclerotome

23

Division of alar and basal lamina/plates

Sulcus limitans

24

Cell type that forms neural tube

Neuroepithelial cells

25

Zones of neural tube

1. Ventricular - ependymal cells
2. Intermediate/ mantle - grey matter
3. Marginal - white matter

26

Three primary brain vesicles

Prosencephalon
Mesencephalon
Rhombencephalon

27

Rhombencephalon forms

1. Metencephalon (pons and cerebellum)
2. Myelencephalon (medulla)

28

Divisions of occipital somites

Pre otic
Pre orbital
Pre occipital

29

What is formed from Pre occipital so mites

Muscles of tongue