The document summarizes key aspects of squid biology. It describes how squids use jet propulsion for transportation and have a closed circulatory system with three hearts. It also covers squid reproduction, with males attracting females through color changes. Squids feed on small fish and shrimp caught with their arms. They can change color through chromatophores to camouflage or communicate.

1.
Transportation
CEPHALOPODA
The squid has external
transport for the example they
Reproduction
swim. For external transport The males attract
you have to physically move females by displaying changing
your body. In this case the squid their color spots and then
and octopus use a sort of jet fertilize her with a special arm.
propulsion, where they expand Female squids can lay up to
their tentacles then contract 70,000 eggs. The eggs are laid
them it makes cephalopods the on basically on anything nearby.
fastest marine invertebrates, Squid adults generally die after
and they can out‐accelerate spawning
most @ish.
Internally the squid has
3 hearts to transport nutrients
throughout the body. Two of
those hearts support the gills, Response to Stimuli
and the other pumps blood
through the body. Squids and The squid has two eyes,
other cephalopods are the only each are opposite the other by
http://en.wikipedia.org/wiki/
Cephalopod
mollusks with a closed being on different sides of the
circulatory system. This means head. Each eye has a hard lens, SOURCES
that the blood never leaves the which is focused through http://www.buzzle.com/articles/
veins and arteries. movement, much like the lens what-do-squid-eat.html
of a camera or telescope. http://wiki.answers.com/Q/
Nutrition Instead of like the human eye How_do_squid_reproduce
that changes shape. http://en.wikipedia.org/wiki/Squid
A squid’s nutrition is
consists of shrimps, @ish and http://en.wikipedia.org/wiki/
other small @ish. When a squid Regulation
Cephalopoda
comes across a school of @ish, it
uses its arms to grab one. Then
To maintain homeostasis
the squid @ilters waste that is
it pulls it into the mouth, which
produced by the brachial
is a parrot like beak and is very
hearts. These are the hearts
strong.
that support the gills. The waste
is sent to the mantel from there
its excreted through a pore.
http://en.wikipedia.org/wiki/
Cephalopod
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2. Respiration Adaptation
Squids exchange The squid has adapted to
gasses with the seawater by its surroundings throughout its
forcing water through gills to evolution. It is able to shoot ink.
breath. The water being This ink when sprayed looks
forced through the funnel can like a dark cloud, and is meant
be used to power jet to confuse their predators. The
propulsion. To get faster ink is held in an ink sac, that
propulsion gills need to be every cephalopod has except
small. The smaller the gills some species of octopus and
the faster the water passes the Nautilidae. The squid and
through. However species most other cephalopods are
that spend most of their time able to change their color. This
moving slowly along the is because of the
bottom don’t need smaller chromatophores, which are
lungs so they have larger color pigments. These color
lungs that move water slower. pigments take on many colors,
and are used to blend their
General Structure surroundings so their predators
can’t @ind them and prey can’t
Squid have a very see them.
weird organelle structure. All
of the organs are located in Squids and Humans
the mantel, which is the head.
Other than the head the The squid in some ways
squids have 5 pairs tentalcles are like humans. We both have
that surround their mouth. bi‐lateral symmetry; this means
And the longer two, termed if you split us in half right down
tentacles, are involved in the middle we would look the
capturing prey. Everybody same on both sides. Also like
knows what a squid is and humans the squid have many
what they look like. But how extinct species. Some of which
many people can say that they include the ammonites, and the
have seen a Giant Squid. belemnites. These species have
belemnites. been extinct for millions of
years. And the squid and other
cephalopods that are still alive
are very important. Us as any
living thing need food, and that
is what squid are. Squid are
what we call calamari, this is a
Japanese reference to cooked
squid tentacles.
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