Animalscaretips
Taxonomic level: phylum Cnidaria; grade of construction: two tissue layers; symmetry: radial; type of gut: blind gut; type of body cavity other than gut: none; segmentation: none; circulatory system: none; nervous system: network of nerve cells; excretion: diffusion from cell surface.
- What type of body cavity do Cnidaria have?
- Do echinoderms have segmentation?
- What type of gut do sponges have?
- Do Cnidaria have jointed appendages?
- Which type of coelom is present in Cnidaria?
- Do cnidarians have tentacles?
- Is segmentation present in Mollusca?
- Does Chordata have segmentation?
- Do echinoderms have segmented legs?
- Are nematodes segmented?
- Do cnidarians have intracellular or extracellular digestion?
- Do sponges have intracellular digestion?
- Do Cnidarians have locomotion?
- Do Cnidarians have Deuterostome development?
- Are Protostomes bilateral?
What type of body cavity do Cnidaria have?
Corals, sea anemones and jellyfish belong to a group of animals called cnidarians. They have a simple body consisting of a central gut cavity surrounded by tentacles. A jelly-like substance called mesoglea lies between the outer and inner layers of the body.
Do echinoderms have segmentation?
Echinoderms: spiny-skinned animals that lack body segmentation but have radial symmetry (usually five g y y ( y part) and an internal skeleton.
What type of gut do sponges have?
Sponges are the simplest animals. They were once thought of as plants but since they cant produce their own food, they must eat organisms, and this puts them in the animal kingdom. Sponges do not have a gut. Instead each collar cell digests its own particles of food.
Do Cnidaria have jointed appendages?
They also have appendages that are jointed and their bodies are segmented.
Which type of coelom is present in Cnidaria?
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 have cnidocytes, specialized stinging cells.
Do cnidarians have tentacles?
Nearly all (about 99 percent) cnidarians are marine species. Cnidarians contain specialized cells known as cnidocytes (“stinging cells”), which contain organelles called nematocysts (stingers). These cells are present around the mouth and tentacles, serving to immobilize prey with toxins contained within the cells.
Is segmentation present in Mollusca?
The phylum Mollusca is the second most diverse phylum after Arthropoda with over 110,000 described species. Mollusks may be primitively segmented, but all but the monoplacophorans characteristically lack segmentation and have bodies that are to some degree spirally twisted (e.g. torsion).
Does Chordata have segmentation?
The arthropods, annelids, and chordates are universally considered segmented. However, there are a number of other animal groups that also display serially repeated units, and could therefore also be considered segmented (Figure 1B) [7,12,13].
Do echinoderms have segmented legs?
Another characteristic of the chelicerates is the presence of two body segments (a cephalothorax and an abdomen). The cephalothorax has six pairs of appendages, including four pairs of walking legs, one pair of chelicerae, and one pair of pedipalps. ... Segmentation is obvious and extensive in these animals.
Are nematodes segmented?
With regards to morphology, nematodes are mostly non-segmented with a cylindrical cross-section with most of them being microscopic (less than one millimeter in length). ... While a good number of nematodes are free-living organisms, there are many parasitic species.
Do cnidarians have intracellular or extracellular digestion?
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.
Do sponges have intracellular digestion?
Sponges are different from other animals in that they can only use intracellular digestion. The additional process of extracellular digestion frees cnidarians and flatworms from exclusive reliance on intracellular digestion. They obtain food by filter feeding or straining food particles from water.
Do Cnidarians have locomotion?
Medusae swim by jet propulsion (see below Tissues and muscles). However, most do so weakly and are carried passively by currents over long distances. Polyps are generally sedentary.
Do Cnidarians have Deuterostome development?
Cnidaria are neither protostomes or deuterostome, as both of these superphylum belong to the Bilateria clade of animals, animals that exhibit...
Are Protostomes bilateral?
Protostomes are a clade of animals that undergo protostomy during their embryonic development. ... These are triploblast animals that display bilateral symmetry.
