Animalscaretips
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. The nematocyst is a coiled thread-like stinger.
- How do cnidarians catch prey?
- What are the adaptations of cnidarians for obtaining food?
- How do cnidarians capture small prey?
- How do cnidarians defend themselves and catch prey?
- What structures do cnidarians have that contain projectile like harpoons that sting their prey?
- What is the common adaptation which unites them into the common group of cnidaria?
- How do cnidarians digest their food?
- What is the effect of the poison produced by cnidarians on their prey?
- How do cnidarians get rid of waste?
- How do Cnidaria breathe?
- What are some adaptations that allow for the medusa form to be free swimming?
- How do cnidarians avoid predators?
- Do Cnidaria have a respiratory system?
- How do nudibranchs take advantage of the cnidarians they eat?
How do cnidarians catch prey?
All cnidarians are carnivores. Most use their cnidae and associated toxin to capture food, although none is known actually to pursue prey. ... Once a food item has been captured, tentacles move it to the mouth, either by bending in that direction or by passing it to tentacles nearer the mouth.
What are the adaptations of cnidarians for obtaining food?
Because cnidarians are sessile or move on currents, they cannot chase prey. Nematocysts are an adaptation that allow cnidarians to efficiently capture prey from passing water. Tentacles move prey to the cnidarian's mouth. Corals also have photosynthetic zooxanthellae in their bodies that provide food for the coral.
How do cnidarians capture small prey?
They use stinging cells called cnidocytes. Their tentacles enable them to capture and hold much smaller prey. When their [prey] touches these nematocysts, small "fangs" inject poison into the [prey].
How do cnidarians defend themselves and catch prey?
Cnidarians defend themselves and catch prey using their tentacles, which have cells called cnidocytes at their tips.
What structures do cnidarians have that contain projectile like harpoons that sting their prey?
Cnidarians contain specialized cells known as cnidocytes (“stinging cells”) containing organelles called nematocysts (stingers).
What is the common adaptation which unites them into the common group of cnidaria?
What is the common adaptation , which unites them into the common group of Cnidaria? Their ability to sting their prey. What language was the word Cnidaria derived from and what does the word mean? The language the word Cnidaria derived from is Greek and it means stinging nettle.
How do cnidarians digest their food?
Cnidarians perform extracellular digestion, with digestion completed by intracellular digestive processes. Food is taken into the gastrovascular cavity, enzymes are secreted into the cavity, and the cells lining the cavity absorb the nutrient products of the extracellular digestive process.
What is the effect of the poison produced by cnidarians on their prey?
What is the effect of the poison produced by cnidarians on their prey? The poison paralyzes the prey of the cnidarian.
How do cnidarians get rid of waste?
Cnidarians take in food through their mouths, which is then digested in the coelenteron. Nutrients are then passed to other areas of the body for use, and waste products are expelled either through the mouth or through surface cells via water circulation.
How do Cnidaria breathe?
Cnidarians don't have lungs, and even though they live in aquatic environments they don't have gills either. ... Instead of breathing, gas exchange in Cnidarians occurs through direct diffusion.
What are some adaptations that allow for the medusa form to be free swimming?
The mouth opens into the main body cavity, or enteron, which connects with radial canals extending to the outer rim of the bell. The medusa is a free-swimming form; it moves by rhythmic muscular contractions of the bell, providing a slow propulsive action against the water.
How do cnidarians avoid predators?
The name Cnidaria comes from the Latin cnidae which means 'nettle'. All of the animals within this group have stinging cells which they use for the capture of prey and to protect themselves against predators. Sea anemones are simple animals, often attached to hard surfaces such as rocks and boulders.
Do Cnidaria have a respiratory system?
Cnidarians lack organs. This means that they do not have respiratory or circulatory systems. Like the cells in sponges, the cells in cnidarians get oxygen directly from the water surrounding them.
How do nudibranchs take advantage of the cnidarians they eat?
Aeolid nudibranchs have the amazing ability to consume cnidarians without causing the nematocysts to fire. Instead, the nematocysts get passed up to the tips of the nudibranchs' cerata and stored, where they then work as the nudibranchs' defense mechanism.
