Hunger Games

ECHINODERMS

why argon Echinoderms more advanced than Crustaceans They grow endoskeleton, five-part radial-ply tire symmetry, water-vascular systems and coelomic circulation and respiration.


Habitat: They can be found on the sea shore but most Echinoderms live in the boneheaded ocean.

How the sea star reproduces: In most species of Asterias the sexes be separate. The gonads pillow at the base of the arms and, when filled with eggs or sperm, may occupy almost the entire arm.

Locomotion: Hundreds of pipe feet extend from the bottom of the radial canals, and each foot is connected to the water filled sac called an ampulla. When water is pumped from the sacs into the pipe feet, they expand outward. Suckers on the ends of the tube feet attach firmly to stiff surfaces. When muscles force water back into the ampulla, the tube feet shorten, pulling Asterias forward.

Phylum: Echinodermata
Fishes


Why are Fish more advanced than Echinoderms Fish have fins, Gills, Single-loop blood circulation, Scales, and Vertebral column (backbone).


Habitat: They live in the deep ocean just like the Echinoderms.

Reproduction: The sexes are separate in most slantes, and generally fertilization takes roam externally.



In a process called spawning, male and female gametes are released near one another in the water. A egg yolk sac within each egg contains nutrients the developing embryo go forth need for growth. The yolk sac remains tie to the hatchling fish but is quickly used up. Then, the growing fish must seek its own food. More likely than not, it will become food fore some larger animal. galore(postnominal) species of fishes released large numbers of eggs that are fertilized in a single spawning season. This practice helps ensure that some individuals will outlive to maturity.

Locomotion: The caudal fins thrust from side to sine to strike the fish forward. The dorsal fins prevent the perch from rolling everyplace as it swims, and the anal fin keeps the fish from veering sideways....If you penury to get a full essay, order it on our website: Orderessay



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