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Comparative Anatomy > Fish Skulls > Flashcards

Fish Skulls Flashcards

1
Q

What are the three fundamental divisions of the skull?

A

Dermatocranium, Splanchnocranium, and Chondocranium

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2
Q

Which divisons of the skull formed by dermal (intramembranous) ossification

A

Dermatocranium

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3
Q

Which divisons of the skull formed by endochondral ossification

A

Splanchnocranium & chondrocranium

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4
Q

Which division of the skull appears first in the fossil record

A

Chondrocranium

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5
Q

What parts of the skull are derived from neural crest?

A

The front of the dermantocranium and chondocranium

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6
Q

What parts of the skull are derived from mesoderm?

A

The back of the dermatocranium and chondocranium

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7
Q

What is different about the location of the branchial arches in agnathans and gnathostomes?

A

The location of the branchial arches in agnathostomes is lateral to the gill. In gnathostomes branchial arches are medial to the gill.

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8
Q

How would you explain the location of location of the branchial arches in agnathans and gnathostomes?

A
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9
Q
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Comparative Anatomy (15 decks)

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