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.
Which of the following are characteristics of the phylum Cnidaria?
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.
What is the meaning of Gastrovascular?
Definition of gastrovascular : functioning in both digestion and circulation the gastrovascular cavity of a jellyfish.
What is the difference between a gastrovascular cavity?
The key difference between gastrovascular cavity and alimentary canal is that gastrovascular cavity is a two-way digestive tract which has only one opening while the alimentary canal is a one-way digestive tract which has two openings.
What is central 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). Extracellular digestion takes place within the central cavity of the sac-like body.
Why can’ta sponge carry extracellular digestion?
Lacking a true digestive system, sponges depend on the intracellular digestive processes of their choanocytes for their energy intake. The limit of this type of digestion is that food particles must be smaller than individual cells. Sperm carried by water currents fertilize the eggs of other sponges.
What are 5 characteristics of cnidarians?
The five main characteristics of cnidarians are:
- Radial symmetry.
- Diploblastic animals.
- Tissue level of organisation.
- Presence of cnidoblasts with stinging nematocysts on the tentacles.
- Polymorphism and have two body forms, i.e. polyp and medusa.
Which six characteristics do all organisms in phylum Cnidaria share?
The Phylum Cnidaria
- Radially Symmetrical.
- Body multicellular, few tissues, some organelles.
- Body contains an internal cavity and a mouth.
- Two different forms exist, medusa and polyp.
- Reproduction is asexual or sexual.
- Has a simple net like nervous system.
- Has a distinct larval stage which is planktonic.
What does Gastrovascular mean in Latin?
gastrovascular (not comparable) (anatomy) That has both a digestive and a circulatory function.
What does the Gastrodermis do?
Gastrodermis helps in extracellular digestion of food in the gastrovascular cavity.
How does the method of Prehension vary among animals?
Different species use different techniques to prehend food – for example, horses and goats rely considerably on their lips, whereas cattle, dogs and cats don’t use their lips to any extent, but rather, gather many foods with their tongues.
What is polyp and medusa?
There are two basic cnidarian body shapes: a polyp form, which is attached to a surface; and an upside-down free-floating form called a medusa. Some cnidarians change form at different phases of their life cycle, while others remain in one form for their entire life.
What does gastrovascular cavity mean?
Freebase(3.00 / 2 votes)Rate this definition: Gastrovascular cavity. The gastrovascular cavity is the primary organ of digestion and circulation in two major animal phyla: the Cnidaria and Platyhelminthes . The cavity may be extensively branched into a system of canals.
Does gastrovascular cavity have two openings?
A gastrovascular cavity is a digestive sac with only a single opening. An alimentary canal has two openings (a mouth and anus) between its digestive tubes unlike the gastrovascular cavity in which food is ingested and eliminated through the same opening.
What is the abbreviation for gastrovascular cavity?
How is Gastrovascular Cavity abbreviated? GVC stands for Gastrovascular Cavity. GVC is defined as Gastrovascular Cavity rarely.