122 Invertebrates_ Molluscs.txt

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122 Invertebrates_ Molluscs.txt
2013-02-13 00:36:42
Invertebrate zoology molluscs

Muollusc body terms and functions physiology ect
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  1. Mollusca
    • mollis = soft
    • 100k species
  2. main mollusc features
    • muscular foot
    • shell
    • visceral mass
    • radula
    • mantle
    • Ctenidium
    • protostome cleavage
  3. mantle cavity
    void in-between the body of a mollusk, and its mantle
  4. filament
    rod-like structure to help maintain strength and rigitidy
  5. veliger
    planktonic larva of many kinds of sea snails and freshwater snails, marine and freshwater gastropod molluscs
  6. girdle
    strong but flexible structure that holds shell plates together
  7. ventricle
    tube that collects and expells blood from atrium
  8. torsion
    rotation of visceral mass
  9. efferent vs afferent vessel
    • efferent vessel (from gill to excratory system)
    • afferent vessel (to gill from excratory system)
  10. bipectinate vs. monopectanate gill
    • bipectate - "two winged comb" gill
    • monopectanate - "one winged combe" gill
  11. hemocyannin vs hemolymph vs. Hemoglobin
    • henmocyannin - blue blood, copper based hemolymph
    • hemolymph - clear fluid that surrounds organs and circ. system
    • hemoglobin -  red blood, iron based hemolymph
  12. palps
    filtering large flap like folds
  13. exhalant/inhalant siphon
    • water entering and exit sites
    • inhalent -  brings water into mantle cavity
    •             - more sensory tentacles
    • exhalent- water and waste exits mantle cavity
  14. ligament
    Horny elastic stucture or structures, joining the two valves of the shell
  15. ctenidium
    • site of gas exchange cavity
    • (gills)
  16. radula
    scrapping organ used to obtain food
  17. pericardium
    sac that contains the heart
  18. Auricle/atrium
    blood receiver of the heart
  19. cephaliziation
    head/face formation (eyes, mouth development feat)
  20. planospiral
    having the shell coiled in one plane
  21. pallial line
    The mark on the inside of a bivalve shell left at the position of the attachment of the mantle lobes
  22. adductor muscles
    Muscle connecting the two valves of the shell
  23. esthes
     light sensing organs that are derived from the mantle of the organism
  24. tetra-neury
    having 4 nerve cords
  25. siphon/funnel
    openings in bivalves
  26. branchial heart
     accessory pumps in cephelapods
  27. mantle
    Fleshy or membranous outgrowth of the body wall which secretes the shell
  28. central axis
    an imaginary axis along the length of a shell
  29. odontophore
    the tongue of flesh underlying the radular membrane
  30. pallial groove
    groove-shaped mantle cavity, where the gills are located
  31. assymetrical helical coiling
    coiling of the mantel and shell in a assymetrical coil not completely overlapping each other
  32. lemellibranch
    sheep gill -  maximizes surface area and minimizes size (smile with teeth look)
  33. Open circulatory system
    pump blood into a hemocoel with the blood diffusing back to the circulatory system between cells. Blood is pumped by a heart into the body cavities, where tissues are surrounded by the blood.
  34. crystaline style
    aids in digestion and mucus clean up
  35. Molluscan cross
    radial alignment of cells during development
  36. systemic heart
    main pump heart
  37. camera eye
    a lens projecting an image onto a retina (no blind spot)
  38. muscular foot
  39. shell
    protective shield
  40. visceral mass
    • internal mass covered by mantle
    • secretes shell
  41. Mulluscan classes
    • aplacophora "no plate bearer"
    • monoplacophora "one plate bearer"
    • polyplacophora "many plate bearer"
    • gastropoda "stomach foot"
    • bivalvia "2 shell" / pelecypoda " hatchet foot"
    • scaphopoda "spade foot"
    • cephalopoda "head foot"
  42. Polyplacophora
    • chitons
    • dorsal ventrical compressed body
    • shell divided to 8 plates
    • marine organisms
    • no developed head
  43. Gastropoda
    • "stomach foot"
    • snails and slugs
    • marine, freshwater, terrestrial
    • D-V elongation of the body
    • coiling of the body and shell
    • tortion
    • oblique shift of the body and shell
  44. Gastropoda types
    • prosobranch "gill in front" - torsion and shelled
    • opsthobranch "gill in rear" - gill loss detorsion, lost of shell
    • pulmonate "lung" - terrestrial, lost gills
  45. Aplacophora
    • "no plate bearer"
    • Neomania
    • no shell
    • oldest mollusc
    • burrowing, crawling
    • marine based
    • fleshy body
  46. Monoplacophora
    • "one-plate bearer"
    • Neopelina
    • one shell
    • reflects general ancestor
    • large satome
    • deep sea animal
    • large shell
    • foot
  47. Bivalvia/pelecypoda
    • "two-shell / hatchet foot"
    • mussels and clams
    • Lateral compression of body and foot
    • dorsally hinged shell
    • decephalization
    • lost radula
    • crystaline style
    • marine and freshwater
    • burrowing or anchored
  48. Scaphopoda
    • "spade foot"
    • Dentallium
    • small group
    • deposit feeders
    • no ctenidium-perculum-circ.system
    • burrowing org.
    • one way current function
  49. Cephalopoda
    • "head foot"
    • squid, octopi
    • carnivores
    • shell reduction
    • high metabolic rate
    • ink gland
    • cognitive thinking
    • strictly marine, swimming
    • beaks
    • concurrent gas exchange