A nematoblast cell, also known as a cnidoblast, is a stinging cell found in Cnidarians. These specialized cells are crucial for the survival of these aquatic animals.
Understanding Nematoblasts
Nematoblasts are a defining characteristic of the phylum Cnidaria, which includes:
- Sea anemones
- Corals
- Jellyfish
- Hydra
These cells are primarily located on the outer epithelial surface of these organisms.
Functionality of Nematoblasts
The main function of nematoblasts is defense and prey capture. Here's how they work:
- Trigger Mechanism: Nematoblasts contain a harpoon-like structure called a nematocyst.
- Discharge: When triggered by physical or chemical stimuli, the nematocyst is discharged rapidly.
- Stinging: The ejected nematocyst pierces the target, injecting venom or adhering to it.
- Paralysis/Capture: This process paralyzes small prey or deters predators.
Key Features Summarized
| Feature | Description |
|---|---|
| Name | Nematoblast (also known as Cnidoblast) |
| Location | Outer epithelial surface of Cnidarians (coelenterates) |
| Function | Stinging for defense and prey capture |
| Organisms | Found in sea anemones, corals, jellyfish, hydra, and other cnidarians |
| Mechanism | Contains nematocyst (harpoon-like structure) that is discharged upon stimulation |
