Why is the cnidarians digestive system inefficient?

1. Does Cnidaria have incomplete digestive system?
2. How do cnidarians eat and digest?
3. Why do birds have a faster and more efficient digestive system than the other vertebrates?
4. Why do cnidarians lack an internal skeletal system?
5. How does digestion in cnidarians differ from digestion in sponges?
6. How do cnidarians maintain homeostasis?
7. How do cnidarians excrete waste?
8. What would happen to a cnidarian that could no longer carry out extracellular digestion?
9. Do cnidarians have a circulatory system?
10. Why do birds require an efficient digestive system?
11. Why do birds have a smaller digestive system?
12. What animal has the most efficient digestive system?
13. Do cnidarians have a gut?
14. Why do cnidarians have diffused nervous system?
15. Are cnidarians Diploblastic?

Does Cnidaria have incomplete digestive system?

Cnidarians carry out extracellular digestion, where enzymes break down the food particles and cells lining the gastrovascular cavity absorb the nutrients. Cnidarians have an incomplete digestive system with only one opening; the gastrovascular cavity serves as both a mouth and an anus.

How do cnidarians eat and digest?

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.

Why do birds have a faster and more efficient digestive system than the other vertebrates?

Because most birds fly, their metabolic rates are high in order to efficiently process food and keep their body weight low. ... Birds do not have separate openings to excrete urine and feces. Instead, uric acid from the kidneys is secreted into the large intestine and combined with waste from the digestive process.

Why do cnidarians lack an internal skeletal system?

Cnidarians are not considered to have a coelom because they are diploblastic, so they don't have any mesodermic tissue. Cnidaria are a phylum consisting of aquatic animals like jellyfish, anemones, and corals. ... Cnidaria also use their coeloms to swim and even to form a hydrostatic skeleton.

How does digestion in cnidarians differ from digestion in sponges?

These organisms show a simple organization. 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.

How do cnidarians maintain homeostasis?

Cnidarians secrete hormones from glands that allow them to maintain homeostasis. They use direct diffusion in order to circulate the necessary nutrients through its body.

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.

What would happen to a cnidarian that could no longer carry out extracellular digestion?

What would happen to a cnidarian that could no longer carry out extracellular digestion? -Cnidarians are not capable of extracellular digestion. -The animal would no longer be able to digest food. ... Intracellular digestion would still be possible for the digestion of food.

Do cnidarians have a circulatory 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.

Why do birds require an efficient digestive system?

Birds have a highly efficient, simplified digestive system. ... Since birds need to remain light in order to fly, their metabolic rates are very high, which means they digest their food very quickly and need to eat often. Contrast this with the ruminants, where the digestion of plant matter takes a very long time.

Why do birds have a smaller digestive system?

This is very similar to the human intestine function. Birds that eat easily digestible foods like fruit, flesh and insects have short lengths of intestines and those that eat seeds, plants and fish need longer intestines so that the food items have enough time for the nutrients to be absorbed.

What animal has the most efficient digestive system?

The heart also helps to make the crocodile's digestion the most efficient in the animal kingdom. After a meal the heart directs deoxygenated blood, rich in acidic carbon dioxide, to the stomach. The blood stimulates the production of the most acidic gastric juices known in nature.

Do cnidarians have a gut?

In cnidarians, the gastrovascular system is also known as the coelenteron, and is commonly known as a "blind gut" or "blind sac", since food enters and waste exits through the same orifice. ... This cavity has only one opening to the outside which, in most cnidarians, is surrounded by tentacles for capturing prey.

Why do cnidarians have diffused nervous system?

In the cnidarian body, the nerve net serves as a sensory locator; neuron cells stretch all around the animal's body and allow the cnidarian to detect chemical changes, to capture prey, and to move in response to a stimulus. This kind of expansive nerve net is also known as a diffuse nerve net.

Are cnidarians Diploblastic?

Cnidarians are generally regarded as diploblastic animals, possessing endoderm and ectoderm, but lacking mesoderm.