Does a hydra have a Gastrovascular cavity?
Complete answer: In the hydra, the polyp-like body is surrounded by the tentacles. These organisms appear as the globular and the shorter. These organisms possess the central cavity body and this acts as the gastrovascular cavity.
What animal has a Gastrovascular cavity?
The gastrovascular cavity is the primary organ of digestion and circulation in two major animal phyla: the Coelenterates or cnidarians (including jellyfish and corals) and Platyhelminthes (flatworms).
How do flatworms digest their food?
Most flatworms take in food via their mouth, then move it into a digestive gut that attaches to the digestive structures. The food then breaks down and is absorbed out into the rest of the organism. Some have an anus to remove wastes, but most don’t and will simply excrete unused food through the mouth.
What is the advantage of a Gastrovascular cavity?
What is the advantage of a gastrovascular cavity that ramifies throughout the body? Higher surface area for the distribution/absorption of nutrients.
What are the disadvantages of a Gastrovascular cavity?
Cards
| Term What does some of the best and known adaptations involving animals include? | Definition Their feeding and digestion |
|---|---|
| Term What is a disadvantage of gastrovascular cavity? | Definition It cannot eat continuously |
| Term What is the alimentary canal? | Definition “flow through eating” |
Which of the following is an advantage of a complete digestive system over a Gastrovascular cavity?
There are obvious advantages of such a system over a gastrovascular cavity, among them the fact that food moves in one direction through the tubular system, which can be divided into a series of distinct sections, each specialized for a different function.
What is the advantage of a complete gut?
Complete digestive systems are better able to absorb nutrients, since each organ is separate and can specialize. It also allows for continuous intake of food, which lets animals grow bigger and develop more complex structures.
What is the advantage of an open digestive system over a closed digestive system?
Digestive tracts with two openings also make digestion more efficient, since they provide different sites with different physical and chemical conditions (mouth, stomach, bowels) for the action of different complementary digestive enzyme systems.
Which of the following would be considered the greatest advantage in having a complete gut in comparison to a Gastrovascular cavity?
Explanation: The food comes from one hand, moving in that specialized region until it comes out. That way, our digestive system will carry much more food nutrients , allowing more waste to be removed. A complete digestive tract’s main advantage is its efficient nutrient absorption.
What is the difference between a complete and an incomplete digestive system?
An incomplete digestive system consists of a digestive cavity with one opening. The single opening serves as both mouth and anus. A complete digestive system consists of a digestive tract with two openings. The other is the anus.
Do Ctenophores have a complete digestive system?
Ctenophores, one of the most basal branches in the tree of life, have been found to have a through-gut, complete with mouth and anus. Basal animals are surprisingly complex and simplification has been rampant in animal evolution.
Do sea urchins have a complete or incomplete digestive tract?
The inside of a sea urchin is dominated by a large, coiled digestive system which consists basically of a tube joining the lower mouth to the anus on the upper surface. The digestive system then narrows into a short rectum (re) that leads to the apical anus.