Science Bio Project

Topics: Blood, Nervous system, Animal Pages: 7 (1127 words) Published: June 21, 2013
Phylum Porifera

Basic Characteristics
No definine symmetry
Bodies are multicellular, with few tissue and no organs.
The cells and tissues surround a water filled space but there is no body cavity. Has no nervous system
Has a larval stage.
Are all filter feeders.
Sponges are among the oldest animals, being discovered about 500 million years ago!

Phylum Cnidaria

Basic Characteristics
Live in both fresh water, and salt water.
Radial Symmetry; typically quadramous
Diploblastic (two germ layers during development) –
ectoderm and endoderm
Adult body with an outer cellular layer (Epidermis or
Ectodermis) and an inner cellular layer (Gastrodermis)
with a non-cellular layer (Mesoglea) in between
Tissue level of organization – some specialized tissues Present Possess unique stinging or adhesive structures (Cnidae) found in specialized cells (cnidocytes); most common Cnidae called nematocysts The phylum Cnidaria consists of about 10,000 species of simple animals found only in marine habitats.

Phylum Platyhelmenthes

Basic Characteristics
Has Bilateral symmetry
The bodies of the animals in this kingdom have 3 layers of tissues with organs and organelles They have a normal nervous system of fibers.
Mostly produce sexually as hermaphadites.
Most feed on animals and other smaller life forms, as a host. ( Can feed on humans.) When a single individual is separated into two parts, the parts can regenerate into two separate tapeworms!

Phylum Rotifia

Basic Characteristics
Bilateral Symmetry
Body has two cell layers.
Has a nervous system with a brain, and paired nerves.
Has no circulatory or respitory organs.
All live in a aquatic environment.
Usually swim free, or attached.
These small creatures actually posses a gut and a anus to process food!

Phylum Nemotoda
Round Worms

Basic Characteristics
Bodies are usually bilateral symmetrical, and vermiform .
Has two cell layer’s, tissues, and organs.
Possess a gut with a sub terminal anus.
The body of the roundworm is covered in a complex cuticle.
They have no circulatory system (meaning no blood system.)
They feed on almost everything.
Live just about everywhere.
The body cavity is a pseudocoel, body fluid under high pressure. Nematodes are mostly known for there damaging effects done on crops, and are abundant in fresh water!

Phylum Annelidia

Basic Characteristics
Bilateral symmetry, and vermiform.
Body has two cell layers, tissues, and organs.
Posses a gut, mouth and a anus.
Has three separate sections, the prosomium, a trunk and a pygidium Nervous system with a anterior nerve ring, ganglia, and a ventral nerve cord. No true closed circulatory system.
No true repertory organs.
Feed on a wide range of materials.
Live in most environments.
Some Annelidia are hermaphadites, and posses both male and female, reproductive organs!

Phylum Mollusea

Basic Characteristics
Bilaterally symmetrical.
Has more than two cell layers, tissue and organs.
The body has no cavity.
Has a gut, mouth, and anus.
Possesses a open circulatory system, with a heart, and aorta. Has gaseous exchange organs called ctenidial gills.
Possesses a pair of kidneys.
The body is momerical and highly variable in form, may posses a dorsal or lateral forms of protein Some Mollusea don‘t even have a shell or a head!

Phylum Arthropoda
Basic Characteristics
In most cases have bilateral symmetry.
The body has more than two cell layers, tissue and organs.
The body cavity is a true coelom.
Most possess a straight gut, with a anus.
Body is divided into 2 or three sections.
Nervous system includes a brain and a ganglia.
Ancestral Arthropods were the first land animals!

Phylum Enchinodermata

Basic Characteristics
Possess five rayed symmetry, mostly radial, some...
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