Animal Kingdoms

There is so much diversity within life on Earth. By doing the various dissections i've came to the realization that diversity is is a huge part within Animal Kingdoms. Each animal is unique depending on it's uniqueness with feeding/digestion, reproduction, respiration, circulation, nervous system & more.


phylum annelida

The phylum Annelida is diverse in many ways. This phylum containing earthworms, leeches, and marine worms are all triploblastic, bilaterally symmetrical & also eucoelomate. Marine worms are filter feeders or scavengers. Earthworms squeeze organic material out of the earth. The digestive systems for all three classes are well-developed. The digestive system of annelids consists of an unsegmented gut that runs through the middle of the body from the mouth, located on the underside of the head then all the way to the anus.The gut of the annelida is separated from the body wall by the body cavity. This is called the coelom. The segmented compartments of the coelom are usually separated from each other by tissue. This is called septa, which are separated by the gut and by blood vessels. Annelids are the first to have a closed system of blood vessels, making pumping more efficient. Respiration within the worms occur through diffusion. Since annelids are hermaphroditic, sexual reproduction occurs through the exchange of sperm packets. Members of this phylum have a simple brain located in the anterior end with ganglia in every segment. They can sense light, moisture, and chemicals.

 phylum vertebrata, class amphibia

This Phylum includes Salamanders & Frogs. Transition from aquatic to terrestrial vertebrate & moist epidermis. These amphibians have no specialized membranes. Also they have webbed feet. Has external gills & is a tetrapod. It is cruitial that these amphibians skin stay wet; this is achieved by returning to moist enviroments regularly. Water is where they are able to reproduce, so without it the eggs would dry out and die if layed on land. The eggs also have a thin egg shell. They first start out with gills, the eventually lungs will grow as the amphibian gets older.

phylum arthropoda

Phylum Arthropoda has the most living organisms out of all the other phylums. There are more species of insects than all other plants and animals together. An arthropod has a segmented body covered by an exoskeleton made from chitin and other chemicals. This exoskeleton serves as protection and provides places for muscle attachment. Arthropods must "molt" their exoskeletons. They do such a thing because they don’t grow with them. Arthropods have open circulatory systems consisting of a dorsal heart. This heart collects blood from the body cavity and pumps it back into the body cavity again.  Arthropods have a well-developed, mesodermal, ventral, solid nerve cord and well-developed sense organs.