Please enable JavaScript.
Coggle requires JavaScript to display documents.
Sponges and Cnidarians (Cnidarians (Body structure (Some cnidarians go…
Sponges and Cnidarians
Sponges
Body structure
Sponges are invertebrate animals that usually have no body symmetry and never have tissues or organs
-
The spikes throughout the sponge helps supports the body, keeping it upright underwater
-
-
-
Life in a colony
Stony Corals
-
Coral reefs are home to more species of fishes and invertebrates than any other environment on Earth
Portuguese Man-of-War
The Portuguese man-of-war contains as many as 1,000 individuals that function together as one unit
Some cnidarians live in a colony, a group of individual animals.
-
Sponges mostly live in oceans but also in fresh water, rivers, and lakes
-
Cnidarians
Obtaining food
-
When the stinging cell touches prey this threadlike structure explodes out of the cell and into the prey and when it becomes helpless, the Cnidarian uses tentacles to bring the prey into its mouth.
-
-
Reproduction
Amazingly, some polyps pull apart.
-
-
Movement
The cnidarians movement is directed by nerve cells that spread out like a basketball net which helps it respond quickly to danger and nearby food.
-
Body structure
Some cnidarians go through both a polyp AND a medusa stage in their life, but others are one for their entire life.
-
A medusa is adapted for a swimming life, unlike a polyp, which normally sits and waits for prey.
-
-
There are two forms of Cnidarians, Polyp, and Medusa.