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What is the level of organization in Hydra?
Option: 1
Cellular level of organization
Option: 2
Tissue level of organization
Option: 3
Organ level of organization
Option: 4
Organ system level of organization
Answers (1)
Cnidocytes / Cnidoblast -
- The cnidocytes are the stinging cells present in the body wall of the cnidarians.
- Each cnidocyte contains an organelle called nematocyst.
- Nematocyst consists of chitinous barb which is filled with the hypnotoxin.
- A thread like structure is attached to the barb.
- The outer wall of the cnidocyte has a touch-sensitive projection called cnidocil.
- When touched, the thread is fired from the cnidocyte and coils around the prey.
- The hypnotoxin is injected into the prey’s body.
-
Coelenterates are diploblastic, acoelomate and radially symmetrical animals. They show tissue level of organization.
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