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What does the mouth of the cnidarian open into?
The mouth of a cnidarian, such as a jellyfish or sea anemone, opens into a central body cavity called the gastrovascular cavity. This cavity serves both digestive and circulatory functions, as it allows nutrients to be absorbed and distributed throughout the organism's body.
Compare the frogs blastula with that of a sea star?
The frog blastula is formed through holoblastic cleavage, resulting in a multicellular blastula with a fluid-filled cavity (blastocoel). In contrast, the sea star blastula is formed through radial holoblastic cleavage, leading to a solid blastula with no blastocoel. Additionally, the frog blastula undergoes gastrulation to form a gastrula with three germ layers, while the sea star blastula directly develops into a bipinnaria larva without gastrulation.
What is cnidarians?
This is straight from www.thefreedictionary.com, so I get no credit at all:"Any of various invertebrate animals of the phylum Cnidaria, characterized by a radially symmetrical body with a saclike internal cavity, and including the jellyfishes, hydras, sea anemones, and corals. Also called coelenterate."
Does a sponge have a backbone?
No. A sponge is asymmetrical, because it lacks any organised body plan. Animals with radial body symmetry display a regular arrangement of body parts around a central axis, usually in a circular pattern. jellyfish, for example, have radial body symmetry.
Is a sea star a carnivore herbivore or an omnivore?
A sea cucumber is a Herbivore.
What is a echinoderm's body consist of?
Sea star (starfish), sea cucumber
Please explain the hydrostatic skeleton in sea anemone and earthworm.?
sea anemone possess hydrostatic skeleton . Its cavity is filled with seawater to extend its body and tentacles . The sea anemone closes its mouth and contracts its muscle fibres that are arranged in circles around its body . The contraction of these circular muscles put pressure on liquid of the body cavity . This pressure forces the body to maintain upright position
What is the difference between sponges and sea anemone central cavity?
sponges have central cavity and sea anemone have gastravascular cavity
Does a Sea Star have a one way stomach or two?
A sea star has a unique feeding mechanism that involves a one-way stomach. When it captures its prey, usually bivalves, it can evert its stomach through its mouth and into the shell of the prey to digest it externally. This allows the sea star to absorb nutrients directly from the digested material before retracting its stomach back into its body. Thus, it effectively has a single, functional digestive cavity.
Oxygen is moved around the body of a sea star in its what?
Oxygen is typically carried by the red blood cells of most animals. However, the Sea Star has no "blood" and instead uses sea water to transport its nutrients. Salt water transports the oxygen around a sea star's body.
What does the mouth of the cnidarian open into?
The mouth of a cnidarian, such as a jellyfish or sea anemone, opens into a central body cavity called the gastrovascular cavity. This cavity serves both digestive and circulatory functions, as it allows nutrients to be absorbed and distributed throughout the organism's body.
Sea animals that do not have streamlined body?
octopus and star fish
What are the examples of diploblastic animals?
Examples for diploblastic animals are the following: The members of phylum: cnidarians and phylum ctenophore are diploblastic Cnidarians include hydra, jellyfishes, corals, sea pen, sea fan, sea anemones, obelia, physalia, etc.
Why sea star has a radial symmetrical body plan?
It doesnt, a sea star has bilateral symmetry that only appears radial upon outward looks
How did a sea star be called a sea star?
A sea star is called a sea star simply because of where it lives (the sea) and what it looks like (a star), simple!
Which organism is ectothermic and has little behavorial ability to adjust its body temperature?
Sea Star
What is a sac body plan?
A sac body plan is a simple body organization found in some animals, where the body consists of a central cavity surrounded by a single layer of cells. This cavity acts as a digestive chamber where food is taken in and digested. Examples of animals with a sac body plan include cnidarians like jellyfish and sea anemones.
