Lecture 1 - Orbit to TED Flashcards Preview

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Flashcards in Lecture 1 - Orbit to TED Deck (170)
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1

First step of embryogenesis, multiplying (mitosis)

Proliferation

2

Second step of embryogenesis- movement and changes in shape of cells

Motility

3

Third step of embryogenesis- role assignment of cells

Determination

4

Fourth step of embryogenesis- some genes will be expressed in only certain parts of the body

Differentiation

5

part of the 3 layered gastrula that becomes the mouth

Blastopore

6

part of the 3 layered gastrula that becomes the digestive tube

archenteron

7

Fertilized egg- 2 cell- 4 cell- 8- cell- 16 cell - WHAT?- blastula- 2 layered gastrula- 3 layered gastrula

Morula

8

Lung, Thyroid, Digestive/ Pancreatic cells are formed by which embryonic layer?

Endoderm (internal layer)

9

Cardiac, skeletal, and smooth muscle cells, Tubule cells of kidney, and RBC's are formed by which embryonic layer?

Mesoderm (middle layer)

10

Skin and pigment cells and Brain Neurons are formed by which embryonic layer?

Ectoderm (external layer)

11

ocular component developed at 2.5 mm stage

optic pit depressions

12

ocular components developed at 4 mm stage

optic stalk, vesicle, lens plate

13

ocular component developed at 5 mm stage

optic cup by invagination

14

ocular component developed at 9 mm stage

Lens vesicle - separated from surface ectoderm

15

ocular components developed at 13 mm stage

choroidal fissures close, posterior lens grows forward

16

ocular components developed at 65 mm stage, after 3 months

all basic components of eye are now present

17

ocular muscles derived from the Neuroectoderm

Iris sphincter and dilator

18

ocular tissues derived from neuroectoderm

RPE, PCE, NPCE, pigmented iris epithelium,

19

lens, conjunctive, and gland tissue are derivatives of which embryonic tissue

Surface Ectoderm

20

ocular blood vessels, EOMs, temporal sclera are derivatives of which embryonic tissue?

Mesoderm

21

Embryonic tissues that derive the vitreous

Mesoderm, Surface Ectoderm, Neuroectoderm

22

Age of gestation when orbital bones fuse and ossify

6-7 months

23

angle between orbits in stages of early development

180 degrees

24

angle between orbits at time of birth

70 degrees

25

angle between orbits at adulthood

68 degrees

26

At what age does the orbit reach adult size

16 years old

27

Approximate volume of the adult orbit

30 ml

28

Effect of a maxillary sinus carcinoma on the orbit

roof of maxillary sinus is orbital floor, a carcinoma can invade upward and displace the orbit upward

29

infections of these sinuses can erode the lamina papyracea and involve the orbit.

ethmoid and sphenoid sinuses

30

infection of this sinus is often the cause of orbital cellulitis

Ethmoid sinus