LESSON 2 PART 2 Flashcards
- are commonly known as flatworms.
Phylum Platyhelminthes
consists of nematodes or roundworms.
Phylum Nematoda
are commonly known as segmented or ringed worms.
Phylum Annelida
means jointed legs. Animals which have jointed appendages belong to this phylum. This is the largest phylum in the animal kingdom.
Phylum Arthropoda
Bilaterally symmetrical and triploblastic.
Phylum Mollusca
is derived from the Greek words, echinos meaning hedgehog and derma meaning skin. Thus, echinoderms are spiny-skinned animals.
Phylum Echinodermata
They are bilaterally symmetrical, triploblastic with an organ-system level of classification.
They possess a notochord and a nerve cord.
The circulatory system is closed type.
Phylum Chordata
important scientific tool, used to identify different organisms, based the organism’s observable traits.
Dichotomous Key
consist of a series of statements with two choices in each step that will lead users to the correct identification.
Dichotomous Key
are simple, sac-like sea creatures that filter feed and often stay attached to surfaces.
Urochordata
re small, fish-like animals with a notochord that burrow in sand and also filter feed.
Cephalochordata
have a backbone and a complex structure, including a developed nervous system, and can be found in many environments with diverse diets.
Vertebrata
Bilaterally symmetrical and triploblastic.
Phylum Annelida
Have jointed appendages, exoskeleton and a segmented body.
Phylum Arthropoda
Have pseudocoelom, a false body cavity.
Phylum Nematoda
