class cephalopoda
Download
Skip this Video
Download Presentation
Class Cephalopoda

Loading in 2 Seconds...

play fullscreen
1 / 13

Class Cephalopoda - PowerPoint PPT Presentation


  • 380 Views
  • Uploaded on

Class Cephalopoda. “ Head/ Foot” Octopus, Squid, Nautilus, Cuttlefish. Rings of tentacles project from the anterior of the head region. Tentacles function to capture prey, for defense, in reproduction, and in locomotion . . * Range from ¾ inch to 59 feet long.

loader
I am the owner, or an agent authorized to act on behalf of the owner, of the copyrighted work described.
capcha
Download Presentation

PowerPoint Slideshow about 'Class Cephalopoda' - flann


An Image/Link below is provided (as is) to download presentation

Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author.While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server.


- - - - - - - - - - - - - - - - - - - - - - - - - - E N D - - - - - - - - - - - - - - - - - - - - - - - - - -
Presentation Transcript
class cephalopoda

Class Cephalopoda

“ Head/ Foot”

Octopus, Squid, Nautilus, Cuttlefish

slide2

Rings of tentacles project from the anterior of the head region.Tentacles function to capture prey, for defense, in reproduction, and in locomotion.

range from inch to 59 feet long

* Range from ¾ inch to 59 feet long

Most have internal shell. Ex. Squid

Others have no shell. Ex. Octopus

Nautiloids have large shell

2 types of cephalopods
2 TYPES OF CEPHALOPODS
  • 1. Nautiloids: covered by shell
slide5
Produce large, coiled shells with chambers separated into sections called SEPTA.
  • Chambers are filled with gas and helps with buoyancy for swimming.
slide7
CUTTLEFISH:
    • bulky body
    • fins
    • 10 appendages (8 short arms, 2 long tentacles).
    • Small internal shell
slide8
SQUID:
    • Large, cylindrical body
    • Paired fins that come from mantle tissue
    • Have 8 arms and 2 longer tentacles
    • Arms have cup-like suckers used to hold prey during capture.
    • Internal strip of hard protein within the squid called a PEN. It is extra support for the mantle.
slide9
When disturbed- they cloud water with inky fluid.
  • Ink gland produces dark fluid called SEPIA which contains pigment called MELANIN.
movement
MOVEMENT
  • Swim by jet propulsion produced by forcing water through a siphon.
communication
COMMUNICATION
  • They have a very complex nervous system.
  • Octopus can be trained to do simple tasks. Remember: the octopus opening the jar.
  • They can change shape and color for camouflage.
  • They communicate with others by coloration changes because they have CHROMATOPHORES (color changing cells).
feeding and nutrition
FEEDING AND NUTRITION
  • Cephalopods are carnivores.
  • Their diet depends on the habitat.
  • To remove gastropods from their shells- octopods drill a hole through the shell with their RADULA and inject poison in them.
  • Squids tear prey with jaws
reproduction
REPRODUCTION
  • Sexes are separate and courtship is common.
  • Male squid have a modified arm that packages sperm and is used to put sperm into the females mantle cavity.
  • Once the egg is fertilized, it is released into the water column by oviduct.
  • Cephalopods usually only reproduce once in their lifetimes and then they die.
ad