Crustaceans

Roly Polys get water from the dew on the grass. Roly Polys also find water underground where they burrow to drink.

All crustaceans have a distinctive larval form called the nauplius. The nauplius stage is characterized by the development and usage of appendages and antennae.

Bails water.

When it molts, it basically takes off its shell and has to wait until a new one grows. In the meanwhile, it doesn't have a shell, meaning that it's soft and easier to eat.

yes

The process in which crustaceans shed their shell is a process called molting.

You catch and remove the crays (If necessary remove all rocks branches etc first). Then you can syphon out the water and remove the gravel (Substrate). Clean and/or replace the substrate after the tank has been scrubbed clean. Then clean or replace all the rocks branches etc. Replace or clean (at most) 80% of the filter medium and refill the tank. Add water conditioner if necessary to remove chloramine/chlorine, adjust temperature and return the fish/crayfish to their home.

They prefer foods like shrimp pellets or various vegetables but will also eat tropical fish food, regular fish food, algae wafers, and even small fish that can be captured by their claws, such as goldfish or minnows

There is no such tihng as a modified form of cellulose, but the word you are looking for is probably chitin, another organic molecule which is very similar to cellulose. Chitin is the second most abundant organic molecule on earth, second only to cellulose.

The Atlantic Cockle's diet consists mainly of plankton.

It varies because they are getting killed and more are getting born from eggs

Because of the hardness and inflexibility of the arthropod exoskeleton, they are not suited to expansion and need to be shed or discarded entirely to allow the arthropod to grow. This action is usually called moulting.

The structure in humans that the digestive glands are comparable with crayfish are the glands that are found in the mouth and the stomach. These glands will secrete salivary amylase and HCI respectively to aid digestion in humans.

Muscles move the gastric mill. The gastric mill is a gizzard that is found in the majority of decapod crustaceans.

Any crustaceans (shrimp, krill, etc) that live in the open ocean (off-shore and off the bottom)

The digestive system of a crustacean is also a tube-within-a-tube.

• Green gland near the mouth of the crustacean secretes digestive juices and begins digesting externally.

• the stomach has two regions as appose to a crop and gizzard.

The Gastric mill portion functions as a gizzard, and grinds food with chitinous teeth, while the posterior portion filters out coarse food particles. Also differing, is the site of absorption, this takes place in digestive glands as appose to the intestine.

yes

Crustaceans have jointed appendages, meaning their legs can bend, and they have segmented bodies. They have an exoskeleton made of the protein chitin, and they often have bilateral symmetry. They have an open circulatory system.

It is in Phylum Arthropoda, which means 'jointed feet'

Crustaceans (true and false crabs, lobsters and prawns etc) need oxygen, just like we do, but instead of using lungs inside the body they use gills outside the body to get it. Gills (and lungs) work because oxygen is a very small molecule. During respiration oxygen molecules first dissolve into a layer of moisture surrounding a thin membrane. Then the oxygen molecules, because they are so small, cross right through the membrane into the circulatory system (the blood) of the animal. The source of the oxygen can either be as gas in the air or already dissolved in another liquid - like the sea. It doesn't matter where the oxygen originally comes from, the most important factor in respiration is that the surface the oxygen molecules cross is wet. In decapods (10-legged crustaceans like crabs and lobsters) the gills are protected because they are enclosed in a chamber under the sides of the carapace (the hard shell that covers the head and thorax). Crustaceans that live in water have no trouble keeping their gills moist. Crustaceans that live on land or on rocky shores where the tide comes and goes keep their gills wet by using fluids from inside the body and by having the chamber well sealed so that very little moisture is lost. The gills themselves are feathery structures at the tops of the walking legs of decapod crustaceans. They are derived from part of the jointed walking leg.

Source: http://museumvictoria.com.au/crust/question.html

Mostly dirt and soil

In South America(Peru/Chile) eating crayfish is avoided because of fears they might have been retrieved from a cemetery.