reptile, amphibian and fish GI anatomy

Question 1

whats the difference between acrodont and pleurodont teeth

Answer 1

acrodont = crest of bone (not replaced with bone)
pleurodont = labial wall (shed and replaced)

Question 2

do chelonians have teeth

Answer 2

no

Question 3

what adaptations do snake’s jaws have allowing them to eat large prey

Answer 3

• cranial kineses = can move upper and lower jaws relative to cranium
• quadrate bone = loose articulation with lower jaw
• no mandibular symphysis

Question 4

do snakes have a cardiac sphincter

Answer 4

no

Question 5

explain where the spleen, gall bladder and pancreas is located in snakes

Answer 5

in a little triad close together near stomach bulge

Question 6

do snakes have an obvious stomach

Answer 6

no

Question 7

what is the difference between a physostomous and physoclistous

Answer 7

physostomes = pneumatic duct maintains connection with esophagus, gulp air to fill bladder (food can enter accidentally)
physoclistous fish = use capillary network as source of gases