Skull

Question 1

components of the skull in agnatha and chondrichthyes

Answer 1

chondocranium and splanchnocranium

Question 2

components of the skull in teleostomi

Answer 2

chondocranium, splanchnocranium, dermatocranium

Question 3

dermatocranium - forms as ___ in the embryo, present as ____tissue in a) chondrichthyes /agnatha, b) teleostomi

Answer 3

BONE

NOT in chondrichthyes and agnatha

dermal bone in teleostomi

Question 4

splanchnocranium forms as __in embryo, present as ___ in chond/agnath and teleostomi

Answer 4

CARTILAGE

cartilage in chondrichthyes and agnatha

endochondral bone in telestomi

Question 5

chondocranium forms as __ in embryo, present as __ in chond/agnath and teleostomi

Answer 5

CARTILAGE

cartilage in chond and agnatha

endochondral bone in teleostomi

Question 6

composition of the braincase in different taxa

Answer 6

agnathans and chondrichthyes - entirely chondocranium

teleostomi - Roof, sides, dorsal region - dermatocranium, floor - chondocranium

Question 7

Splanchnocranium function

Answer 7

Pharyngeal arches 1 - VII (7)

1st - MANDIBULAR ARCH

2nd - HYOID ARCH

3 - 7 - BRANCHIAL ARCHES

Question 8

Branchial arches

Answer 8

support the gills, serve as attachment sites for several respiratory muscles

Question 9

Jaw composition in chondrichthyes

Answer 9

entirely palatoquadrate and meckel’s cartilage of the splanchnocranium

Question 10

jaw composition in teleostomi

Answer 10

for most, splanchnocranium AND dermatocranium

Mammals - ONLY dermatocranium