Phyla

Question 1

Platyhelminthes

Answer 1

20000 (flatworms)
Bilateraly symmetrical
Gastrovascular cavity with single opening that serves as a mouth and an anus
body has 3 layers of tissues with organs
body without cavity
body has blind gut, mouth but no anus
flattened body shape

Question 2

Cnidaria

Answer 2

10000 jellyfish, sea anemones and corals
radically symmetrical (body circular with parts that radiate out)
gastrovascular cavity singular opening that serves as a mouth and an anus
reproduce sexually or asexually
single net-like circulatory system
live in aquatic environments, mosty marine

Question 3

Chordata

Answer 3

90% are vertebrates, but chordata does include 2 invertebrate groups.
Closed circulatory system with blood transported in arteries, veins and capillaries bilaterally symmetrical

Question 4

Porifera

Answer 4

5000 (sponges)
asymmetrical, body is multicellular with few tissues, no organs
cells and tissues surround a water filled space, but no true cavity
are all sessile (as an adult, live attached to something)
reproduce sexually or asexually

Question 5

Athropoda

Answer 5

1,000,000 athropods
usually bilateral symmetrical
segmented
hard exoskeleton (internal skeleton) of protein and chitin
most have though gut, (with mouth and anus)
joint appendages (body parts attached to main trunk such as arms legs wings)
have more than 3400+ pairs of join legs

Question 6

Nematoda

Answer 6

-25000- round worms
-bilateraly symmetrical
-body covered by tough cuticle (of collagen and chitin)
-alimentary canal (digestive system) with mouth and anus but no circulatory system
-found in most aquatic habitats, soil, moist tissues of plants and body fluids and tissues of animals

Question 7

Echinodermata

Answer 7

7000- star fish
-five rayed symmetry, mostly radial, sometimes bilateral
body has more than 2 cell layers , tissues and organs
thin epidermis covering an endoskeleton; most species prickly, due to skeletal bumps and spines
most have short though gut (with mouth and anus)
body shape highly variable, but with no head

Question 8

Mollusca

Answer 8

100000- mollusc
Bilateraly symmetrical
body without cavity
body has though gut (with mouth and anus)
uses muscular foot for locomotion
open circulatory system with heart and aorta

Question 9

Annelid

Answer 9

16500- segmented worm
bilaterly symmetrical
body has more than 2 cells layers, tissues and organs
Body cavity, nervous system
body has through gut (with mouth and anus)