Details

Title: !Fishes 2

Description: Jaws

Total Flash Cards: 10

Created: 11/11/2009 07:26:56

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Additional Biology Flashcards

Cards in this set:

Term
visceral arches
 Definition
system of supports surrounding pharynx. 4 paired elements (pharyngo-, epi-, cerato-, hypobranchial); single median element (basibranchial)
Term
gill arches
 Definition
support of gills, associated w/ visceral arches
Term
mandibular arch
 Definition
anterior most visceral arch, first arch; upper elements palatoquadrate; lower elements Meckel's cartilage
Term
hyoid arch
 Definition
second visceral arch; braces jaws; hyomandibular is upper element; ceratohyal is lower paired element; spiracle is remnant of gill slit in cartilaginous fishes, b/w hyoid and mandibular arch; hyoid arch, not jaws, primitively supported gill tissue
Term
remaining visceral arches
 Definition
support gills: gill arches, branchial arches
Term
visceral arch system
 Definition
not homologous to branchial basket of lampreys
Term
jaw origin
 Definition
arose from modification of anterior most visceral arches in jawless fishes; application of this to jaws not well supported in fossil record, but no other alternate model
Term
serial homology
 Definition
structure thats repeated in diff segments, and modified in each segment for diff functions
Term
anterior post arches for?
 Definition
modified for prey capture, modified first for respiratory pumping of water
Term
evolutionary advantages of jaws
 Definition
greater diet breadth, greater efficiency