Lab 3 Dissection

Question 1

Pallial line

Answer 1

This line shows where all of the mantle muscles were attached in life

Question 2

incurrent and excurrent siphons

Answer 2

water enters the mantle cavity through the inhalant siphon, moves over the gills, and leaves through the exhalant siphon.

Question 3

anterior side of bivalve is

Answer 3

side of umbo

Question 4

mantle lobe

Answer 4

secretes shell

Question 5

umbo on dorsal or ventral side

Answer 5

dorsal

Question 6

gills

Answer 6

collect water and collect food, gas exchange

Question 7

labial palps

Answer 7

direct particles too large to be consumed out of mussel and smaller particles to mouth

Question 8

why complex nervous system in cephalopods

Answer 8

predation/being predators and variable food resources and habitats

Question 9

squid eye and human eye

Answer 9

convergent evolution

Question 10

arm

Answer 10

8 arms. feeding, locomotion, copulation

Question 11

tentacles

Answer 11

2. initial capture of prey

Question 12

siphon

Answer 12

locomotion (directs outflow of water from mantle cavity during jet propulsion)

Question 13

Chromatophores

Answer 13

pigment cells

Question 14

beak

Answer 14

jaw like structure in cephalopods

Question 15

ink sac

Answer 15

a glad atop digestive gland. for safety from predators

Question 16

anus near siphon

Answer 16

solid waste sent away from squid easier through the siphon using jet propulsion

Question 17

branchial hearts

Answer 17

pump blood to gills of squid at base of gills