The Skeletal System of Annelida
The Annelida's Skeletal System is a fluid and rigid hyrdostatic skeleton and plays a role in the locomotion of the Annelida. This hyrdostatic skeleton makes use of an outer cuticle that is never shed or molted. The hyrdostatic skeleton used by Annelida's consist largely of Coelom fluid which serves to protect the Annelida and facilitate its movements.
The Annelida's Skeletal System is a fluid and rigid hyrdostatic skeleton and plays a role in the locomotion of the Annelida. This hyrdostatic skeleton makes use of an outer cuticle that is never shed or molted. The hyrdostatic skeleton used by Annelida's consist largely of Coelom fluid which serves to protect the Annelida and facilitate its movements.
Hirudo medicinalis
(Leech) Leeches are usually more round and fatter than the other two worms, yet it also has a hydro-skeletal system. Since the Annelids have a hydro-skeleton, they are pretty sensitive and can get crushed easily because the skeleton only helps to keep the gravity from making the organs to collapse.
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Lumbricus terrestris
(Earthworm) A earthworm does not have a skeleton. It has bristles on each segment called
setae that help the earthworm move. Earthworms have no limbs. They have two sets of muscles; one that makes it long and thin and one that makes it fat. |
Alitta succinea
(Ragworm) Rag worms are segmented worms, which eat bacteria and other worms. Each segment has its own set of organs to allow the individual segment to survive on its own. Each segment has a pair of paddle like structure. The rag worm has a hydro- static skeleton, not a bone structure.
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