Mammalian Final! Flashcards Preview

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Flashcards in Mammalian Final! Deck (69)
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1

Regions of skull (2)

Neurocranium
Facial skeleton

2

Embryological origins of skull (2)

Nerual crest
Mesoderm

3

Ossification types of skull (2)

Endochondral ossification
Intramembranous ossification

4

Phylogenetic origins of skull (3)

Chondrocranium
Splanchnocranium
Dermatocranium

5

Regions of occipital bone (3)

Supraoccipital
Ex-occipitals
Basioccipital

6

Function of occipital series

Protects otic capsule

7

Regions of sphenoid bone (5)

Basisphenoid
Presphenoid
Orbitosphenoid (optic capsule)
Alisphenoid (greater wing)
Pterygoid process

8

Function of sphenoid series

Protects optic cavities

9

Regions of ethmoid bone (3)

Turbinates
Perpendicular plate
Cribiform plate

10

Cribiform plate function

Brain rests on it
Olfactory nerve travels through cribiform foramina

11

Meckel's cartilage
(what is it derived from, what does it contribute to later)

Derived from splanchnocranium
Contributes to mandible in later mammals

12

Splanchnocranium contribution

1st pair of cartilaginous rods becomes jaws
Forms hyoid bone and part of larynx
Contributes to ossicles

13

Phylogenetic skull region with jaw articulation (uniquely to mammals) ((where did it shift from?))

Dermatocranium
Shifted from splanchnocranium; quadrate-articular joint

14

Bones contributing to facial vault in dermatocranium (3)

Frontal
Parietal
Interparietal

15

Bones contributing to facial skeleton in dermatocranium (3)

Maxilla
Nasal
Incisive (premaxilla)

16

Primary palate comes from which phylogenetic region of skull?

Chondrocranium

17

Secondary palate comes from which phylogenetic region of skull? Which bones are responsible?

Dermatocranium
Maxilla fusing together

18

Bones contributing to lateral walls of nasal cavity (4)

Pterygoids
Palatine
Maxilla
Premaxilla

19

Bones contributing to floor (palate) of nasal cavity (3)

Palatine
Maxilla
Premaxilla

20

Bones contributing to median wall of nasal cavity (2)

Vomer
Perpendicular plate

21

Bones contributing to orbital skeleton (5)

Lacrimal
Zygomatic
Palatine
Frontal
Sphenoid

22

Regions of temporal bone (3)

Pterous portion
Squamous portion
Ossicles and styloid

23

Developmental origins of teeth and what each origin contributes (2)

Ectoderm; ridge forms dental lamina
Neural crest; condenses to form dental papillae

24

Tooth cell populations (2)

Ameloblasts
Odontoblasts

25

Tooth materials (4)

Dentine
Enamel
Cementum
Pulp

26

Location of odontoblasts; what they produce

Core of tooth
Produce dentine

27

Location of ameloblasts; what they produce

Outside of tooth
Produce enamel

28

Enamel structure, composition, cellularity

Highly crystalline
Made of hydroxyapetite
Acellular (ameloblasts die after its production)
Hardest structure in vertebrates

29

Dentine structure, composition, cellularity

Tubular
Made of hydroxyapetite with some collagen
Cytoplasmic extensions of odontoblasts responsible for tubes

30

Pulp contribution and origin

Contains blood vessels and nerves
Derived from neural crest