Squid Dissection

Question 1

one of the most highly developed invertebrates

Answer 1

squid

Question 2

squid is classified under phylum _____

Answer 2

mollusca

Question 3

meaning of Class Cephalopoda

Answer 3

“head-footed”

Question 4

reason why squids are “head-footed”

Answer 4

its head is pushed down toward the foot

Question 5

other animals included in class Cephalopoda

Answer 5

• octopus
• cuttlefish
• ancient nautilus

Question 6

special covering of the mollusks is called

Answer 6

mantle

Question 7

parts of a squid

Answer 7

• mantle
• eight arms with two longer feeding tentacles all with suckers
• beak
• mouth
• siphon
• large head with a brain
• two large eyes
• three hearts

Question 8

where are suckers located at the tentacles of a squid

Answer 8

at the tip only

Question 9

the large eyes of squids are very similar in structure to ______

Answer 9

people’s eyes

Question 10

what happened to the shell of the squid

Answer 10

reduced to a chitinous pen that is embedded in the upper surface of the mantle

Question 11

what do squids use to breathe?

Answer 11

gills

Question 12

how do squids move?

Answer 12

by squirting water from the mantle through the siphon

Question 13

how can a squid move forward and backward?

Answer 13

they change the direction of the water flow through the siphon

Question 14

squid is a _____ & ____ predator

Answer 14

• fast
• active

Question 15

squids have a very good ______

Answer 15

defense mechanism

Question 16

what do squids do to hide from predators and mimic their environment?

Answer 16

change skin colors

Question 17

why does food needs to be in small pieces before swallowing?

Answer 17

the esophagus runs through the brain

Question 18

squids feed on:

Answer 18

• small crustacean
• fish
• marine worms

Question 19

squid way of reproducing

Answer 19

they release eggs into the water

Question 20

after mating, a female squid will produce ___ elongated egg strings, which contain hundred of eggs in each string

Answer 20

10-50

Question 21

what happens to the parents after leaving the spawning ground?

Answer 21

they die

Question 22

approximately how many days does it take for the eggs to hatch on its own?

Answer 22

approximately 10 days

Question 23

12 external parts of the squid

Answer 23

• chromatophores
• fins
• mantle
• pen
• eyes
• tentacles
• arms
• suckers / suctions
• mouth
• beak
• collar
• siphon (funnel)

Question 24

8 internal parts of the squid

Answer 24

• gills
• ink sac
• heart
• buccal bulb
• gonads
• cornea
• lens
• radula