OCTOPUSES

ESSENTIAL QUESTION AND SIMILE

• How do octopuses use their adaptations to survive?
• Octopuses are undiscovered as the depths of the ocean

SIZE AND SHAPE OF THE OCTOPUSES

• The smallest species measure only a few inches
• while the largest, the giant Pacific octopus, can be 14 feet long

ARMS OF THE OCTOPUS

• The two rear-most arms function as legs
• They are used to push off the ocean floor
• Anchor itself in one place
• Crawl over rocks and debris
• The other six arms are used as “arms” are expected to be used

SUCKERS OF THE OCTUPUS

• The suckers play an important role in octopuses senses of touch and taste
• Each sucker is believed to contain thousands of chemical receptors
• The suckers are also create a suction and grip onto prey or the substrate

EYES OF THE OCTUPUS

• Octopuses contain many of the parts that human eyes do
• Including: the iris, the pupil, the lens, the retina, and the optic nerve
• The eye is one of the most important senses to the octopus
• It uses its sense of vision to choose a mate
• Find a den, blend in with its environment, and locate prey.

THE ARMS OF THE OCTOPUS

• The two rear-most arms function as legs

THE HEART OF THE OCTUPUS

• Some octopuses have three hearts
• Each pump blood through the octopus’s closed circulatory system
• This system includes: veins, arteries and capillaries
• Two of the hearts pump blood to the two gills
• The third heart pumps blood to the rest of the octopus's body

THE MOUTH OF THE OCTOPUS

• The Octopuses mouth is like a beak such as a parrots
• It's sharp and used to bite and grasp prey
• Inside the beak is a radula
• This structure contains ribbons of small teeth
• Salivary glands contain venom which paralyzises the prey and begins the octopus's digestion process

BIBLIOGRAPHY

• Kalupa, Julia. "The Giant Pacific Octopus:Enteroctopus Dofleini." The Giant Pacific Octopus:
• Adaptation. N.p., Spring 2012. Web. 09 Jan. 2014.
• Ellias, Natalia. "What Are Some Traits That Help Octopuses Survive?" Animals. N.p., n.d. Web. 10 Jan. 2014.
• Ryan, Tom. "How Do an Octopus's Arms Help It to Survive?
• Animals. N.p., n.d. Web. 10 Jan. 2014.

THE BRAIN OF THE OCTUPUS

• This invertebrate is a very intelligent creature
• It does have a complete nervous system
• Since the octupus does not have many defensive adaptations
• It must use its brain to survive