Exam 1/Quiz 2
Card Set Information
Exam 1/Quiz 2
Skeleton vert everything
Endochonral bone, cartilage, supports and protects brain, form sensory capsules
always bone- formed from dermis, outer casing of skull
*brain that grows
endochondral bone and/or cartilage, derivatives of visceral arches, *form neural crest
Upper jaw formed...
Lower jaw formed...
1st type jaw suspension, bottom jaw loosely connected to brain case by hyomandibula
Jaw suspension partially supported by hyomandibula
Jaw suspension advanced in fishes- both upper and lower jaw are attached to hyomandibula
Hyomandibula has become what in human ear?
Quadrate has become what in human ear?
Articular has become what in human?
Present in sluggish fish
Only in tail region
Caudal artery and vein run thru there
covers body cavity
*to strengthen body wall and prevent collapse
Intermuscular rib/Dorsal rib
strengthens myosepta (connective tissue) and transfer force from segmental muscles
Main part of vertebrae
Canal for spinal cord
in tail, runs caudal artery and vein
Which vertebrae contain no ribs
Which category of animals have most cervical vertebrae
Evolved from notochord, jelly-like
Which vertebrae have ribs
1st cervical vertebrae
Vertebrae missing the centrum
2nd Cervical vertebrae
What acts as the axel from the Axis
Neural canal acts as axel to 2nd vertebrae- Axis
What mammals do not contain sacral vertebrae
Dolphin, manatee, whale
What vertebrae are limited in dolphins, whales and manatees
Cervical vertebrae- are thin but havent fused
-- small and compressed -- minimizes instability and adds power