Transcript Virtual Squid Dissetion

Virtual Squid
Dissection
Virtual Dissection Lab
Hello! Welcome to Mr. D’s Virtual
Dissection Lab.
While you may not be able to
participate in the lab, I hope you
will find this quick exploration into
the world of one of the coolest
cephalopods
fun!!
Please watch the following video. It will give
you a glimpse into the world of the Squid
• Wait for the play button to appear
Squids Info!
The Squid is an invertebrate (animal without a backbone) that swims in the
oceans. This mollusk is closely related to the octopus. Squid can change the color
of their skin to mimic their environment and hide from predators.
Squid are soft-bodied organisms. They are classifieds as Phylum: Mollusk, Class
cephalopods. They move by squirting water from the mantle through the siphon,
using a type of jet propulsion. When in danger, squid squirt a cloud of dark ink in
order to confuse their attacker and allow the squid to escape. Squid reproduce by
releasing eggs into the water. Some squid eggs are free-floating, others are attached
to seaweed or to the ocean floor.
• Anatomy: Squid range from 1 to 60 ft (0.3 to 18 m) long. The biggest
squid is the Giant Squid (Architeuthis). Squid have a large
mantle/head (with a large brain), eight arms with suckers, two longer
feeding tentacles, a beak, a large head, two large eyes, and two hearts.
Their large eyes are very similar in structure to people's eyes. They
breathe using gills.
• Diet: Squid eat fish, crustaceans (like shrimp), and other squid. These
fast-moving carnivores (meat-eaters) catch prey with their two feeding
tentacles, then hold the prey with the eight arms and bite it into small
pieces using a parrot-like beak. The esophagus runs through the brain, so
the food must be in small pieces before swallowing.
• Predators: Many animals prey upon squid, including many sharks and
other fish, some whales, squid, and people.
• Classification: Kingdom Animalia, Phylum Mollusca, Class
Cephalopoda, Order Teuthoidea, Families Loliginidae, Sepiolidae, and
Architeuthidae.
Can you name the external parts?
First read
the
descriptions
Below
And
complete
worksheet
Eye
Tentacles
Head
Fins
Mantle
Siphon
Arms
Beak & Mouth
Then…click
and check
your
answers
Clubs
arms (8) - eight short limbs, each of which has two rows of suction cups on the lower
side; the arms hold the food while the squid bites it into swallowable pieces.
beak and mouth - the parrot-like beak on the mouth is used for biting food into
small pieces. The beak and mouth are surrounded by the bases of the arms and
tentacles.
clubs (2) - the ends of the tentacles, which have toothed suckers.
eye - an organ used to see; squids have two, very large eyes (they are large in
proportion to the size of the body).
feeding tentacles (2) - the two, long tentacles are used for obtaining prey; they have
toothed suckers only near the tip.
fins - two flaps on the mantle that are used to stabilize the squid during swimming.
head - the small part of the body between the mantle and the arms; the head
contains the eyes, the brain, and the muscular buccal mass (which crushes the food).
mantle - the large part of the squid in front of the head; inside the mantle are the
stomach, gills, ink sac, pen, reproductive organs, and many digestive organs.
siphon - a tube-like organ on the lower side of the head; it expels water forcefully,
enabling the squid to propel itself through the sea.
Squid Dissection
• Now you can watch a squid dissection. Just
follow along with the instructor and check the
boxes as he proceeds through the external and
internal dissection.
• The tour of the external anatomy will look at the
dorsal and ventral side
• Put a check mark for each part as they are
identified by the instructor on your worksheet
• Have Fun!! Make sure your name, period, date
and your teacher’s name is on the lab sheet
Exterior Dissection
• Wait for the play button to appear
Interior Dissection
Wait for the play button to appear
Just about done!
•
•
•
Ok now you are done.
Now sit back and watch Giant Squid (Architeuthis) footage, January 27, 2013
This is longest video of a Giant Squid in its natural habitat. Giant Squid footage
Hide & Seek Cephalopod Style!
The Mimicking Octopus