Snails and Slugs
Phylum mollusks, snails and slugs, live in deserts, rivers, ponds, ditches, and all part of the ocean. Snails and slugs eat plants, meat, and algae. The phylum mollusks live in a shelled prey that they drilled holes inside to live. The shells that they drill from are usually from oysters and clams. Some small ocean snails are parasites which is anything that lives off something else.
The human beings use slugs and snails for jewelry in Australia. The phylum mollusks also involve being in medical research. They are the reason we know so much about the human nervous system. Snails and slugs are also very popular dishes in other countries. Snails can be collected and can be very expensive to buy.
Slugs use gills if they are in the water. But some use lungs on land. The lungs/ gills are located inside the mantle cavity and also exchange gases through exposed, wet skins. They breathe through a specially adapted mantle cavity, and it's well supplied with blood vessels. It also is folded to increase its surface area. And the mantle at all times must stay wet.
One type of snail is called the crinkled amber snail. It lives usually on the land. Another type of snails is the wrinkled dune snail. They live have been found on both land and the water.One more type of snails is the banded wood snail. Now one type of slugs is the banana slug. They are usually large and very colorfully. They are usually found in gardens. The final slug is the spotted leopard slug.
 
Where do they live? What are examples of their habitat and food source?
How are these animals important to humans and the environment?
How do they get oxygen and get rid of carbon dioxide?
What are some examples of this group of animals?  
The scientific name and classification?
The classification or the snails and slugs is called "Gastropod." The big and special name is mollusk. That is the family that snails and slugs are in. The gastropod is the biggest group of mollusks. Snails and slugs are some pretty cool mollusks.
How do they support their shape? Do they have a skeleton?
To support their shape the snails and slugs have shells. Snails and slugs do not have any skeletal system within their body. Their whole body basically consists of a foot that includes the entire length of the body. That is how they move around and stuff. They are very soft and flexible.
  How do these snails and slugs reproduce? What is the life cycle like?
 
Snails and slugs are hermaphrodites. That means that they have both a penis and a vagina. They produce both sperm and eggs. They are born externally. Although most of them are internally fertilized.
Some unique features about snails and slugs.  
Snails and slugs are the biggest class of mollusks. Mollusc means "soft things." There are 37,500 species of snails and slugs. These snails and slugs are either single celled or they have no celled.
What is their nervous system like? Do they have specific sensory structures?
The nervous system is like a rope or ladder. It is near the head because of the sensual organs. Nerve knots are also incorporated in the nervous system. Another name for never knots is ganglia. Snails and slugs have the same nervous system.  
What is their excretory system like? How do they eliminate the wastes we get rid of as urine?
The excretory system is a kidney connected to the heart bag. Mollusks have one or two pairs of sponge-like nephridia. They are also similar to Kidneys. Excretory system gets carried out by a pair of nephridia, and that's how they get rid of the wastes. Nephridia are tubular structures that collect fluids from the coelomand
 How do these animals digest their food? Do they have a complete digestive  system?
They digest their food by an opening over the anus. The digestive systemis complete, with a mouth, anus and complex stomach. The anus is near the pallial cavity. The digestive gland also helps with the process, and it is called hepatupancreus. Snails and slugs have a very large intestine.
 What is the circulatory system like?
Snails and slugs have an open circulatory system. That means that the blood does not circulate entirely within the vessels. The small blood filled space is called, hemocoel. The hemocoel replaces the coelom. It is then reduced to a very, very small area.
image of european black slug