Animalscaretips
8th grade Chapter 12 vocabulary
| A | B |
|---|---|
| hermaphrodite | an animal that produces both sperm and eggs |
| tentacles | surrounds the mouth of cnidarian and has stinging cells |
| medusa body form of cnidarian | bell shaped; tentacles hang down; free-swimming |
| polyp body form of cnidarian | sessile; vase shaped; tentacles point up |
- What is a vase shaped cnidarian?
- What is the shape of a cnidarian?
- What is polyp form?
- Which shape of cnidarians is umbrella shaped?
- Is a jellyfish a medusa or polyp?
- What is Mesoglea made of?
- Are cnidarians pelagic?
- Is a sponge a cnidarian?
- What makes a cnidarian a cnidarian?
- What is Medusa and polyp?
- What kind of symmetry do Cnidaria have?
- What type of organism is Hydra?
- What is the larva of a cnidarian called?
- Is Coral a cnidarian?
What is a vase shaped cnidarian?
A polyp in zoology is one of two forms found in the phylum Cnidaria, the other being the medusa. Polyps are roughly cylindrical in shape and elongated at the axis of the vase-shaped body.
What is the shape of a cnidarian?
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 is polyp form?
polyp, in zoology, one of two principal body forms occurring in members of the animal phylum Cnidaria. The polyp may be solitary, as in the sea anemone, or colonial, as in coral, and is sessile (attached to a surface). ... The lower end of the polyp typically is adapted for attachment to a surface.
Which shape of cnidarians is umbrella shaped?
medusa, in zoology, one of two principal body types occurring in members of the invertebrate animal phylum Cnidaria. It is the typical form of the jellyfish. The medusoid body is bell- or umbrella-shaped.
Is a jellyfish a medusa or polyp?
Body Forms
Sea anemones are examples of the polyp forms, while jellyfish are examples of the medusa forms. In the current classification, the Cnidaria phylum is divided into two major groups, Anthozoa and Medusozoa, based on the structure of polyps and the existence of a medusa stage in the life cycles (Fig.
What is Mesoglea made of?
Description. The mesoglea is mostly water. Other than water, the mesoglea is composed of several substances including fibrous proteins, like collagen and heparan sulphate proteoglycans. The mesoglea is mostly acellular, but in both cnidaria and ctenophora the mesoglea contains muscle bundles and nerve fibres.
Are cnidarians pelagic?
Most species undergo a life cycle where a bottom dwelling colonial stage produces the pelagic forms which release either eggs or sperm. ... Cnidarians can be found all the way from the surface to the bottom of the oceans, although most species have a specific range of depth over which they are found.
Is a sponge a cnidarian?
Sponges are aquatic invertebrates in Phylum Porifera. ... Cnidarians are aquatic invertebrates in Phylum Cnidaria. They include jellyfish and corals, both of which have radial symmetry.
What makes a cnidarian a cnidarian?
Cnidarians are radially symmetrical (i.e., similar parts are arranged symmetrically around a central axis). They lack cephalization (concentration of sensory organs in a head), their bodies have two cell layers rather than the three of so-called higher animals, and the saclike coelenteron has one opening (the mouth).
What is Medusa and polyp?
Polyp is a sessile life cycle stage of species who belong to phylum cnidaria. Famous examples of polyp are sea anemones and adult corals. ... Medusa is a life cycle stage of the species who belongs to cnidaria phylum. One of the most common examples of species having a medusa life cycle is Hydrozoa or jellyfish.
What kind of symmetry do Cnidaria have?
The bilateral symmetry of Cnidaria is thought to be inherited from the common ancestors of both cnidarians and triploblastic bilaterians. The secondary radial symmetry of Cnidaria evidently is a result of the adaptation to the sessile mode of life.
What type of organism is Hydra?
Hydra, genus of invertebrate freshwater animals of the class Hydrozoa (phylum Cnidaria). The body of such an organism consists of a thin, usually translucent tube that measures up to about 30 millimetres (1.2 inches) long but is capable of great contraction.
What is the larva of a cnidarian called?
planula, plural planulae, free-swimming or crawling larval type common in many species of the phylum Cnidaria (e.g., jellyfish, corals, and sea anemones). The planula body is more or less cylindrical or egg-shaped and bears numerous cilia (tiny hairlike projections), which are used for locomotion.
Is Coral a cnidarian?
Cnidarians are soft-bodied animals that include corals, jellyfish, and sea anemones. These soft-bodied animals have saclike digestive cavities and tentacles containing rows or stinging cells used for defense and capture of food.
