Internal anatomy of octopuses

Discussion in 'Physiology and Biology' started by gholland, Aug 28, 2008.

  1. gholland

    gholland Haliphron Atlanticus Supporter

    Joined:
    Jan 18, 2008
    Messages:
    569
    Likes Received:
    0
    I'm duplicating the following post from my journal in this forum where it might be more visible (and maybe of future use) in hopes that one of our resident experts or someone with ceph dissection experience can provide insight.

     

    Attached Files:

  2. cuttlegirl

    cuttlegirl Colossal Squid Supporter Registered

    Joined:
    Sep 16, 2005
    Messages:
    4,891
    Likes Received:
    236
    Location:
    Pittsburgh, PA
    I think that you have labeled the ink sac correctly. I think that item 2 are the ovaries or testes and item 3 are the branchial hearts. Branchial hearts are at the base of the gills, so this would be the correct position for them.

    I am much more familiar with squid (and cuttlefish) anatomy than octopus, so I could be wrong...
     

    Attached Files:

  3. Taollan

    Taollan Vampyroteuthis Supporter

    Joined:
    Aug 17, 2005
    Messages:
    292
    Likes Received:
    45
    Location:
    Walla Walla University
    Red = Gills
    Blue = Digestive gland
    Green = Gonads
    Yellow = Branchial Heart
     

    Attached Files:

  4. gholland

    gholland Haliphron Atlanticus Supporter

    Joined:
    Jan 18, 2008
    Messages:
    569
    Likes Received:
    0
    Thank you both for clearing that up. The confusion came from diagrams like the one cuttlegirl posted that always seem to show the reproductive organs positioned above the branchial hearts.

    Next question... I take it from Taollan's response that this particular octo is definitely male? It hasn't shown signs of enlarged suckers and I can't make a visual confirmation of a hectocotylus, but its behavior seems consistent with dwhatley's experience (very active and interactive). What should ovaries look like compared to the elongated light-colored structures on this one (assuming these are truly gonads)?
     
  5. Taollan

    Taollan Vampyroteuthis Supporter

    Joined:
    Aug 17, 2005
    Messages:
    292
    Likes Received:
    45
    Location:
    Walla Walla University
    Gonads can be testes or ovaries. It's just a generic term for a gamete producing organ, male or female. I am not sure which this is.
     
  6. gholland

    gholland Haliphron Atlanticus Supporter

    Joined:
    Jan 18, 2008
    Messages:
    569
    Likes Received:
    0
    Oops. Thanks. :oops:

    I'll try to get some shots of the other 'podes and see if I can note any differences.
     
  7. cuttlegirl

    cuttlegirl Colossal Squid Supporter Registered

    Joined:
    Sep 16, 2005
    Messages:
    4,891
    Likes Received:
    236
    Location:
    Pittsburgh, PA
    In squid (at least Loligo), the testes are milky white (opaque) while the ovaries are clear and/or yellowish in color, but transparent.
     
  8. gholland

    gholland Haliphron Atlanticus Supporter

    Joined:
    Jan 18, 2008
    Messages:
    569
    Likes Received:
    0
    Is there a noticeable difference in the size or shape of the two?
     

Share This Page