Animalscaretips
Tentacles have special structures known as the nematocysts which help in capturing and paralyzing prey. Coelenterates simply wave their tentacles and when a prey comes in contact, the nematocysts inject the toxin that paralyses or kills the prey. Nematocysts are the most distinguishing feature of this phylum.
- Which of the following does the tentacles of Coelenterata contain?
- What do cnidarians have on their tentacles?
- What has tentacles with cnidocytes?
- What are the function of tentacles?
- What is the function of tentacles in cnidarians?
- What do cnidarians use their nematocysts for?
- What does the Gastrodermis do?
- Is cnidoblast and cnidocytes same?
- What is the function of cnidocytes in cnidarians?
- What is the difference between Hydrozoa and scyphozoa?
- Are coelenterates segmented?
- How are coelenterates different from other invertebrates?
Which of the following does the tentacles of Coelenterata contain?
Coelenterates have a holozoic form of nutrition. The mouths of these organisms are encircled with tentacles which have nematocysts.
What do cnidarians have on their tentacles?
Cnidarians contain specialized cells known as cnidocytes (“stinging cells”), which contain organelles called nematocysts (stingers). These cells are present around the mouth and tentacles, serving to immobilize prey with toxins contained within the cells. Nematocysts contain coiled threads that may bear barbs.
What has tentacles with cnidocytes?
All Cnidarians have tentacles with stinging cells in their tips which are used to capture and subdue prey. In fact, the phylum name "Cnidarian" literally means "stinging creature." The stinging cells are called cnidocytes and contain a structure called a nematocyst.
What are the function of tentacles?
Tentacles are slender, flexible organs on the head. They may function in sensory perception and in actually securing food.
What is the function of tentacles in cnidarians?
Tentacles have cnidoblasts (stinging cells) at the tip, which capture and immobilise the prey. Tentacles move the captured food to the mouth. Tentacles also protect cnidarians from predators.
What do cnidarians use their nematocysts for?
Nematocysts or cnidocysts represent the common feature of all cnidarians. They are large organelles produced from the Golgi apparatus as a secretory product within a specialized cell, the nematocyte or cnidocyte. Nematocysts are predominantly used for prey capture and defense, but also for locomotion.
What does the Gastrodermis do?
Gastrodermis helps in extracellular digestion of food in the gastrovascular cavity.
Is cnidoblast and cnidocytes same?
A cnidocyte (also known as a cnidoblast or nematocyte) is an explosive cell containing one giant secretory organelle called a cnidocyst (also known as a cnida (plural cnidae) or nematocyst) that can deliver a sting to other organisms.
What is the function of cnidocytes in cnidarians?
Cnidarians contain specialized cells known as cnidocytes (“stinging cells”) containing organelles called nematocysts (stingers). These cells are present around the mouth and tentacles, and serve to immobilize prey with toxins contained within the cells.
What is the difference between Hydrozoa and scyphozoa?
Differences between a Scyphozoan & Hydrozoan medusae? Schyphozoans - More 'jelly & 4 oral arms. Hydrozoans - No oral arms. Have a velum ring & less jelly (fold up when preserved).
Are coelenterates segmented?
> Option C- Coelenterata: Most of the coelenterates are aquatic. They are diploblastic, radially symmetrical and lack coelom. ... They have radial symmetry and are unsegmented.
How are coelenterates different from other invertebrates?
an aquatic invertebrate animal of the phylum Cnidaria (formerly Coelenterata), which includes jellyfishes, corals, and sea anemones. They are distinguished by having a tube- or cup-shaped body.
