Cnidarians digest their food?

Cnidarians digest their food using a primitive digestive system that contains no organs--they have a mouth (which also serves as the anus) and a gastrovascular cavity. The gastrovascular cavity is a special area of the animal's body that provides a place for food to be digested using cellular digestion and enzymes.

1. Is digestion in cnidarians intracellular or extracellular?
2. How does digestion in cnidarians differ from digestion in sponges?
3. Where do cnidarians usually eliminate their food waste?
4. What does a Cnidaria eat?
5. How do cnidarians excrete waste?
6. Why the digestion in rhizopus is called extracellular digestion?
7. How do sponges and cnidarians get food?
8. How does a sponge obtain and digest food?
9. Why are cnidarians more complex than sponges?
10. How do cnidarians respond to their environment?
11. Do cnidarians have a complete digestive system?
12. How do monkeys eliminate waste?
13. Are cnidarians herbivores carnivores or omnivores?
14. What are two ways that cnidaria obtain food?
15. What do cnidarians have in common?

Is digestion in cnidarians intracellular or extracellular?

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.

How does digestion in cnidarians differ from digestion in sponges?

Sponges have multiple cell types that are geared toward executing various metabolic functions. Cnidarians have outer and inner tissue layers sandwiching a noncellular mesoglea. Cnidarians possess a well-formed digestive system and carry out extracellular digestion.

Where do cnidarians usually eliminate their food 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.

What does a Cnidaria eat?

Most cnidarians prey on organisms ranging in size from plankton to animals several times larger than themselves, but many obtain much of their nutrition from dinoflagellates, and a few are parasites. Many are preyed on by other animals including starfish, sea slugs, fish, turtles, and even other cnidarians.

How do cnidarians excrete waste?

There is no specialised excretory system found in cnidarians. Most of the cnidarians expel their waste out through the body surface by diffusion or through the mouth from the gastro-vascular cavity.

Why the digestion in rhizopus is called extracellular digestion?

Food is broken down outside the cell either mechanically or with acid by enzymes. Fungi use extracellular digestion. Rhizopus is a fungus. Hence it uses extracellular digestion.

How do sponges and cnidarians get food?

Sponges and cnidarians (also known as “sea anemones”) are two very different animals, but they both use the same method to feed themselves: they absorb food through their bodies. That is how sponges and cnidarians feed—all of the food they absorb is then released into the surrounding water.

How does a sponge obtain and digest food?

Sponges feed by straining food particles from water. As water enters a sponge, Page 2 it carries tiny organisms such as bacteria and protists. Collar cells on the inside of the central cavity trap these food particles and digest them.

Why are cnidarians more complex than sponges?

Cnidarians (ni DER ee uhnz) belong to the phylum cnidaria. All of these have stinging cells. They are more complex than sponges because they have complex tissue, a gut, and a nervous system. They reproduce the same way as a sponge.

How do cnidarians respond to their environment?

To respond to stimuli, cnidarians use a rudimentary muscular system consisting of muscle cells lying in bands up and down the body wall and in a circle around the mouth cavity (Fig. 3.27). The body shortens when the vertical bands contract. If muscles on only one side contract, the body bends in that direction.

Do cnidarians have a complete digestive system?

Cnidarians have an incomplete digestive system with only one opening; the gastrovascular cavity serves as both a mouth and an anus.

How do monkeys eliminate waste?

Food and water is digested and then transported by the circulatory system as nutrients, and wastes are eliminated after digestion. They have a closed circulatory system, making them able to transport the nutrients, oxygen, and water by blood cells, to where it is needed.

Are cnidarians herbivores carnivores or omnivores?

The Cnidarians are either carnivores or omnivorous filter feeders. The carnivorous forms do not hunt their prey. Instead they use various 'sit and trap' or 'float/swim and trap' strategies.

What are two ways that cnidaria obtain food?

Cnidarians are carnivores, and some can also consume plant matter. They catch their food using their nematocysts or through filter feeding. Cnidarians digest their food using a primitive digestive system that contains no organs–they have a mouth (which also serves as the anus) and a gastrovascular cavity.

What do cnidarians have in common?

Cnidarians share several basic characteristics. All Cnidaria are aquatic, mostly marine, organisms. They all have tentacles with stinging cells called nematocysts that they use to capture food. Cnidarians only have two body layers, the ectoderm and endoderm, separated by a jelly-like layer called the mesoglea.