Next-Gen

=mine

by Jhardin32
Last updated 4 years ago

Discipline:
Science
Subject:
Biology
Grade:
9

Test Glog

Mollusks are very Awesome in the use of their body parts. They use more than one function when an organ could serve two or six purposes at once. A good example of this is the mantle,the mantle encloses and protects the animal’s internal organs, leaving room for an open internal space called the mantle cavity. The cavity is positioned differently in different mollusk groups and is filled with air or water.Whatever is in the outside environment of the animal. It can serve as a space to exchange carbon dioxide for oxygen.

Mollusks

By: Joe Hardin

Most molluscs have only one pair of gills, or even only one gill. Most molluscs have muscular mouths with radula, "tongues" bearing many rows of chitinous teeth, which are replaced from the rear as they wear out. The radula primarily functions to scrape bacteria and algae off rocks.

Cephalopods rely on their vision to detect predators as well as locate prey. Their vision is advanced enough to detect differences in the size, shape, brightness and orientation of objects. Cephalopods move in part by jet propulsion. Part of the mantle of a cephalopod forms a siphon through which water is forced. Most bivalves are filter feeders. They use their gills to extract food from the water current. Bivalves attach themselves to the surfaces of rocks and other substrates while others bury themselves in the seafloor. Bivalves are diverse, there are about 9200 species alive today.

Gastropod groups feed in different ways. Some are herbivorous while others are predators or scavengers. Those that feed on plants and algae use their radula to scrape and shred their food. Gastropods move using a muscular foot. Gastropods live just about everywhere on Earth, salt water, fresh water, and on land.


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