Types of Organisms:
We find out from http://www.starfish.ch/reef/echinoderms.html that there are 5 main classes of Echinoderms. Here they are in order:
We find out from http://www.starfish.ch/reef/echinoderms.html that there are 5 main classes of Echinoderms. Here they are in order:
Type of Symmetry:
http://study.com/academy/lesson/echinoderm-structure-skeleton-symmetry.html gives us the answer: just about all Echinoderms are Radial Most of them are specficialy Pentaradial, meaning they have FIVE equal segments!
http://study.com/academy/lesson/echinoderm-structure-skeleton-symmetry.html gives us the answer: just about all Echinoderms are Radial Most of them are specficialy Pentaradial, meaning they have FIVE equal segments!
Reproduction Method:
This time, it’s https://www.britannica.com/animal/echinoderm to the rescue. As it turns out, most reproduction from Echinoderms is sexual, and the genders are usually separate. However, there are a few organisms (Like Sea Stars and Sea Cucumbers) that reproduce asexually.
This time, it’s https://www.britannica.com/animal/echinoderm to the rescue. As it turns out, most reproduction from Echinoderms is sexual, and the genders are usually separate. However, there are a few organisms (Like Sea Stars and Sea Cucumbers) that reproduce asexually.
Body Plan:
http://www.mesa.edu.au/friends/seashores/echinoderms.html gives us a brief description of the body plan of Echinoderms. To make it even briefer, most Echinoderms start out bilaterally symmetrical at birth, but as they develop, their symmetry changes to a radial symmetry.
http://www.mesa.edu.au/friends/seashores/echinoderms.html gives us a brief description of the body plan of Echinoderms. To make it even briefer, most Echinoderms start out bilaterally symmetrical at birth, but as they develop, their symmetry changes to a radial symmetry.
Water Vascular System:
Simply put, the Water Vascular System allows Echinoderms to force water into their tentacles, extending them, and gain a “Suction cup” like grip, which explains how they’re able to hold on so tightly. They can then relax their muscles to let go of whatever they’re attached to. http://www.uas.alaska.edu/arts_sciences/naturalsciences/biology/tamone/catalog/echinodermata/Cucumaria_vegae/water_vascular_system.html explains it in far greater detail.
Simply put, the Water Vascular System allows Echinoderms to force water into their tentacles, extending them, and gain a “Suction cup” like grip, which explains how they’re able to hold on so tightly. They can then relax their muscles to let go of whatever they’re attached to. http://www.uas.alaska.edu/arts_sciences/naturalsciences/biology/tamone/catalog/echinodermata/Cucumaria_vegae/water_vascular_system.html explains it in far greater detail.
What interests YOU about these animals?:
Pretty much everything! From the ability to change their symmetrical type through development, to the sheer variety of the phylum, there’s simply too many specific things to name them all! However, a short list is an order:
1. Changing symmetry as they develop.
2. The Water Vascular System
3. The fact that there are over 13,000 extinct species in this phylum.
4. The amount of varietey showcased within this phylum, and
5. How many different types of Sea Stars there are!
Pretty much everything! From the ability to change their symmetrical type through development, to the sheer variety of the phylum, there’s simply too many specific things to name them all! However, a short list is an order:
1. Changing symmetry as they develop.
2. The Water Vascular System
3. The fact that there are over 13,000 extinct species in this phylum.
4. The amount of varietey showcased within this phylum, and
5. How many different types of Sea Stars there are!