BIOLOGY

Biology

Avertebtata /Invertebrata

1. Porifera (Sponges)

			Characteristic:     No definite symmetry.     Body multicellular, few tissues, no organs.     Cells and tissues surround a water filled space but there is no true body cavity.     All are sessile, (live attached to something as an adult).     Reproduce sexually or asexually, sexual reproduction can be either gonochoristic or hermaphroditic.

 

Phylum Porifera                                                           

        Class Calcarea      

                               Order Clathrinida

                               Order Leucosoleniida

                               Order Sycettida

                               Order Leucettida

               Class Hexactinellida

               Class Demospongiae

                               Order Haplosclerida

                               Order Poecilosclerida

               Class Sclerospongiae

Phylum Porifera

        Class Calcarea

                               Order Calcinia    

                               Order Calcaronia

               Class Hexactinellida    

                               Order Amphidiscophora

                               Order Hexasterophora

               Class Demospongiae    

                               Order Homoscleromorpha    

                               Order Tetractinomorpha

                               Order Ceractinomorpha

              

Examples:

Sponges                                 Sycon                                  Spongilla                             Euplectelea

Characteristic:     Having soft and mucous body     Prefect digestion     Real Body cavity     In general, the body is covered by outer skeleton in the form of shell made up lime     Has a pair of kidneys.

 2. Mollusks

The classes:

v  GASTROPODA

v  MONOPLACOPHORES

v  POLYPLACOPHORES

v  SCAPHOPODS

v  BIVALVES

v  CEPHALOPODS

     

Examples :

tusk shells                                           slugs                                      octopus

                                   

2. Colenterates

			Characteristic:     Imperfect digestion     Flat and bilateral symmetry form     hollow bodies     mouth only opening     thin flat bodies

• Class Hydrozoa
• Hydra feeding
• Portuguese Man of War
• Portuguese Man of War Tentacles
• Class Scyphozoa
• Aurelia
• Jellyfish Swimming
• Jellyfish Swimming
• Giant Jellyfish  More is here
• Class Anthozoa
• Sea Anemone eats a fish
• Clown Fish and Sea Anemone
• Coral feeding
• Class Cubomedusae
• Cubomedusa

Examples :

Hydra                                                    Jelly fish

3. Vermes/worm

	Characteristic:     they have bilateral symatry     many have appendages,     some have sensse organs     some have light sense organs have smoothe bodies     able to rejoin bodies

Examples :

Flatworms                                          Roundworms                                     Segmented Worms

                     

4. Echinoermata

			Characteristic: v  Reproduce Sexually v  Breathe by using gills v  Have generation power v  Have digestive organ which start from the mouth, intestine then to the anus, but some have not anus

Classes :

v  Asteroidea

v  Ophiuroidea

v  Echinoidea

v  Crinoidea

v  Holothuroidea

Examples:  

Sea star or starfish       Brittle stars,     Sea urchins,      Holothurians or sea cucumbers  

5. Arthropods

			Characteristic:    A hard outer body covering called an exoskeleton.    Specialized mouth parts    Jointed legs    Compound Eyes    Segmented body

 

Classes :

v  Arachnida

v  Crustacea

v  Diplopoda

v  Chilopoda

v  Insecta or Hexopoda

Examples:

scorpion,                             crayfish,                              butterfly                             , catterpillar,                       shrimp,