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What are the differences between sponges and cnidarians?
Sponges vs Cnidarians One interesting difference between sponges and cnidarians is that sponges lack tissue while cnidarians have tissues but not the organ systems. Sponges and Cnidarians are very primitive acoelomic invertebrates with very simple body structures. Both organisms are found in aquatic ecosystems.
How is the Cnidaria digestive system different from yours?
Cnidarians carry out extracellular digestion, where enzymes break down the food particles and cells lining the gastrovascular cavity absorb the nutrients. Cnidarians have an incomplete digestive system with only one opening; the gastrovascular cavity serves as both a mouth and an anus.
How sponges and cnidarians obtain and digest food?
Sponges pump water into their body through specialized pore cells called porocytes. The water flows through a large central cavity. As it flows by, specialized cells called collar cells trap and digest food particles in the water.
What type of digestive system do sponges have?
Lacking a true digestive system, sponges depend on the intracellular digestive processes of their choanocytes for their energy intake. The limit of this type of digestion is that food particles must be smaller than individual cells.
What is the difference between Cnidaria and Porifera?
Porifera are aquatic organisms known as sponges, while cnidarians are for example jellyfishes, corrals, etc. Poriferans are the most simple multicellular animal organisms. They are always sessile while cnidarians may be sessile (the corrals) or free living (jellyfishes).
What are similarities between sponges and cnidarians?
Porifera and Cnidaria are organisms which share similar characteristics with one another. -They are both multicellular, they consist of many cells working together. They are both eukaryotic, they have DNA in the form of chromosomes contained within a distinct nucleus.
What type of digestive system do most cnidarians have?
Cnidarians are carnivores, and some can also consume plant matter. They catch their food using their nematocysts or through filter feeding. Cnidarians digest their food using a primitive digestive system that contains no organs–they have a mouth (which also serves as the anus) and a gastrovascular cavity.
What two digestive system do cnidarians have?
The tentacles on a cnidarians allows it to reach out and perceive the world. The two digestive system structures that appeared first in cnidarians was stomachs and mouth.
How do cnidarians obtain food?
All cnidarians are carnivores. Most use their cnidae and associated toxin to capture food, although none is known actually to pursue prey. Sessile polyps depend for food on organisms that come into contact with their tentacles.
Do sponges have a true digestive system?
Sponges lack complex digestive, respiratory, circulatory, and nervous systems. Their food is trapped as water passes through the ostia and out through the osculum.
Do sponges have intracellular or extracellular digestion?
Sponges are different from other animals in that they can only use intracellular digestion. The additional process of extracellular digestion frees cnidarians and flatworms from exclusive reliance on intracellular digestion. They obtain food by filter feeding or straining food particles from water.
What do sponges and cnidarians have in common?
• Sponges belong to Phylum Porifera. • Cnidarians belong to Phylum Cnidaria. • Sponges have intracellular digestion and lack tissues. • Cnidarians have nematocysts. • Sponges capture planktons by filtering water through their cells. • Cnidarians are predators and feed on small fish, krill, etc.
What kind of digestive system does a sponge have?
Lacking a true digestive system, sponges depend on the intracellular digestive processes of their choanocytes for their energy intake. The limit of this type of digestion is that food particles must be smaller than individual cells.
What makes a cnidarian different from other carnivores?
The key characteristic features of cnidarians include radial symmetry, acoelomate body with tissues, lack of organs, and the simple digestive sac that opens through a mouth, which is surrounded by tentacles armed with nematocysts. All cnidarians are carnivores and have very simple body structures adapted as predators.
How are sponges different from other living organisms?
In between these two cell layers, there is a gel-like extracellular matrix. In most sponges, this matrix secretes fibrous protein that acts like an exoskeleton. Unlike other animals, sponges have intracellular digestion. Sponges feed on planktons by filtering water.