Squid Dissection Flashcards
one of the most highly developed invertebrates
squid
squid is classified under phylum _____
mollusca
meaning of Class Cephalopoda
“head-footed”
reason why squids are “head-footed”
its head is pushed down toward the foot
other animals included in class Cephalopoda
- octopus
- cuttlefish
- ancient nautilus
special covering of the mollusks is called
mantle
parts of a squid
- mantle
- eight arms with two longer feeding tentacles all with suckers
- beak
- mouth
- siphon
- large head with a brain
- two large eyes
- three hearts
where are suckers located at the tentacles of a squid
at the tip only
the large eyes of squids are very similar in structure to ______
people’s eyes
what happened to the shell of the squid
reduced to a chitinous pen that is embedded in the upper surface of the mantle
what do squids use to breathe?
gills
how do squids move?
by squirting water from the mantle through the siphon
how can a squid move forward and backward?
they change the direction of the water flow through the siphon
squid is a _____ & ____ predator
- fast
- active
squids have a very good ______
defense mechanism
what do squids do to hide from predators and mimic their environment?
change skin colors
why does food needs to be in small pieces before swallowing?
the esophagus runs through the brain
squids feed on:
- small crustacean
- fish
- marine worms
squid way of reproducing
they release eggs into the water
after mating, a female squid will produce ___ elongated egg strings, which contain hundred of eggs in each string
10-50
what happens to the parents after leaving the spawning ground?
they die
approximately how many days does it take for the eggs to hatch on its own?
approximately 10 days
12 external parts of the squid
- chromatophores
- fins
- mantle
- pen
- eyes
- tentacles
- arms
- suckers / suctions
- mouth
- beak
- collar
- siphon (funnel)
8 internal parts of the squid
- gills
- ink sac
- heart
- buccal bulb
- gonads
- cornea
- lens
- radula
