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Bio 218 Unit 3
General zoology - echinodermata, hemichordata, chordata (fish and amphbians)
4
Biology
Undergraduate 2
11/19/2012
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Term
Deuterostome General Features
 Definition

1. Mouth is secondarily derived

2. Radial cleavage

3.  Enterocoelous

4. Regulative development

4. 

 
Term
Echinodermata
 Definition

Benthic life style

Coelom

Oral-aoral orientation

Bilateral larvae, pentaradial adults

Ossilces form a type of skeletal structure

Water-vascular system to move podia

Pedicellaria on the surface for food capture or keeping away unwanted external parasites

Dermal brachiae used in oxygen consumption
Term
Astroidea
 Definition

Starfish

Oral structures

Mouth

Open groves and rows of podia

 

Aoral structures

Spiny, tough surface

Anus

Madreporite for taking water into the water-vascular system

Hemal system functions as nervous system

Two sexes - External fertilization
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