The mollusks are one of the largest phylums of animals consisting of over 47,000 species of living and individuals. Molluscs have very different characteristics one of their specialties is something called a coelom. It is a fluid filled cavity that develops within the mesoderm. A coelom is like a skeleton for the molluscs providing a protection for the organs and it also provides space for the internal organ.
Alll Molluscs have soft bodies which comes from the latin word Mollus meaning "Soft." They also have a hard shell surrounding the soft bodies. There are other species that have evolved from the hard shell including octopus and squids. The main digestive system of the molluscs is found in the visceral mass which contains the organs of the digestive, excretory, and reproduction. The food is taken up cells lining the digestive glands arising from the stomach, and then is passed into the blood. Undigested materials are compressed and packaged, then discharged through the anus into the mantle cavity and are carried away from the animals in the water currents. This packaging of wastes in solid form prevents fouling of the water passing over the gills.
Alll Molluscs have soft bodies which comes from the latin word Mollus meaning "Soft." They also have a hard shell surrounding the soft bodies. There are other species that have evolved from the hard shell including octopus and squids. The main digestive system of the molluscs is found in the visceral mass which contains the organs of the digestive, excretory, and reproduction. The food is taken up cells lining the digestive glands arising from the stomach, and then is passed into the blood. Undigested materials are compressed and packaged, then discharged through the anus into the mantle cavity and are carried away from the animals in the water currents. This packaging of wastes in solid form prevents fouling of the water passing over the gills.
DIGESTIVE SYSTEM
CUTTLEFISH
The digestive system of the cuttlefish is very simple. It begins with the beak, which crushes the food. Particles move down into the mouth and through the esophagus. Food then enters the stomach and eventually passes down in the intestines where it is digested.
The pattern of the stomach varies according to the mollusks diet. Food is taken up by cells lining the digestive glands arising from the stomach, and then is passed into the blood. Undigested materials are compressed and packaged, then discharged through the anus into the mantle cavity and are carried away from the animals in the water currents. This packaging of wastes in solid form prevents fouling of the water passing over the gills.
The digestive system of the cuttlefish is very simple. It begins with the beak, which crushes the food. Particles move down into the mouth and through the esophagus. Food then enters the stomach and eventually passes down in the intestines where it is digested.
The pattern of the stomach varies according to the mollusks diet. Food is taken up by cells lining the digestive glands arising from the stomach, and then is passed into the blood. Undigested materials are compressed and packaged, then discharged through the anus into the mantle cavity and are carried away from the animals in the water currents. This packaging of wastes in solid form prevents fouling of the water passing over the gills.
An octopus is another part of the phylum class in the part of cephalopoda class. It has over 300 recognized species of animals. They are one of the most intelligent animals in the world. They way they digest is quite different though. The octopus has many homes int he ocean including coral reefs, water, and the ocean floor. They have a lot of strategies for defending themselves against predators. They use different tactics including camouflage and ability to jet quickly through the water. They also have ink which they can explode when they are in fear of danger.
An octopus has a two way digestive system with a mouth and an anus. An octopus would normally go hunt for lobsters, crabs, and shrimp. An octopus has three different ways to gain access to their food inside the hard shell of a lobster. One way is to rip open the shells using their suckers. Another way is to use their beak. They specialty of their beak is that they can drill through the shell very easily, the octopus then injects a poisonous gas that immobilizes their prey. The food then goes to their digestive sac.
The octopus has a crop, digestive gland, digestive gland duct appendages and an intestine. The digestive gland is a primary organ that secretes digestive enzymes. It also absorbs and destroyed and excess food. The digestive gland duct is from the digestive gland and is covered with glandular epithelium. Glandular epithelium is something that covers the internal and external body surfaces.
An octopus has a two way digestive system with a mouth and an anus. An octopus would normally go hunt for lobsters, crabs, and shrimp. An octopus has three different ways to gain access to their food inside the hard shell of a lobster. One way is to rip open the shells using their suckers. Another way is to use their beak. They specialty of their beak is that they can drill through the shell very easily, the octopus then injects a poisonous gas that immobilizes their prey. The food then goes to their digestive sac.
The octopus has a crop, digestive gland, digestive gland duct appendages and an intestine. The digestive gland is a primary organ that secretes digestive enzymes. It also absorbs and destroyed and excess food. The digestive gland duct is from the digestive gland and is covered with glandular epithelium. Glandular epithelium is something that covers the internal and external body surfaces.