astronomy-to-zoology:

How do certain invertebrates know if they are rightside up?

the science of statocysts 

certain types of invertebrates like bivalves,echinoderms and cnidarians lack sensory receptors, buy yet they know if they are upside down or not and can right themselves up if knocked over. This is due to a special balance sensory receptor called a statocyst, a statocyst can be easily described as a marble inside a basketball, as the statocyst consists of a sac-like structure with a small ball-like mass inside of it called a statolith. The walls of this fluid filled sac are lined with small setae (hairlike structures). Which when the animal moves or is overturned the statolith inside the sac will respond to gravity and fall into the hairs which in turn will activate neurons that tell the animal what orientation it is in so it can adjust accordingly.

Further reading

Image sources: 1,2


Notes

  1. warm-weimaraner reblogged this from tenmipala
  2. tenmipala reblogged this from astronomy-to-zoology
  3. moreagaara reblogged this from denizensofearth
  4. noxtheox reblogged this from denizensofearth
  5. denizensofearth reblogged this from mad-as-a-marine-biologist
  6. trinkets-and-ish reblogged this from astronomy-to-zoology
  7. mothernaturesfauna reblogged this from astronomy-to-zoology
  8. thenarius reblogged this from ampullae
  9. ampullae reblogged this from lynx-panther
  10. lynx-panther reblogged this from salroka
  11. shark-bait-ooh-haha reblogged this from mad-as-a-marine-biologist
  12. scienceisadesiretoknow reblogged this from astronomy-to-zoology
  13. penguinprince reblogged this from astronomy-to-zoology
  14. meannothing reblogged this from mad-as-a-marine-biologist
  15. keluhperut reblogged this from teguhmanto and added:
    kayak sistem mouse pc jaman dulu yaa
  16. vkalpiero reblogged this from mad-as-a-marine-biologist and added:
    ternyata di invertebrata ada juga..kirain di ikan ajah..
  17. teguhmanto reblogged this from mad-as-a-marine-biologist and added:
    Adakah yang menemukan tentang ini dalam pengerjaan laporan biper tahun lalu??
  18. ladypants reblogged this from pretendguns
  19. pretendguns reblogged this from underthevastblueseas
  20. dirkofgay reblogged this from fuckyeahunderwater
  21. thepiratedragon reblogged this from astronomy-to-zoology
  22. myblackeyeddemon reblogged this from mad-as-a-marine-biologist
  23. mergur reblogged this from astronomy-to-zoology
  24. luckynumber2 reblogged this from mad-as-a-marine-biologist
  25. llamaparts reblogged this from mad-as-a-marine-biologist
  26. fuckyeahunderwater reblogged this from mad-as-a-marine-biologist
  27. sglblues reblogged this from occidentalthoughts
  28. dancin-manatees reblogged this from underthevastblueseas