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Invertebrate Phyla - Coggle Diagram
Invertebrate Phyla
Arthropoda
Largest Phylum
Characteristics:
Exoskeleton
Doesn't grow so it must shed
Paired jointed appendages
segmentation
open circulatory system
Ventral nerve cords
Centipede/ millipedes
- most primitive arthropods
- obvious segmentation
- centipedes (Class Chilipoda
Millipedes (Class Diplopoda)
a. Two pairs of legs per segment
b. one pair of short antennae
Crustaceans
Most are marine
2 body regions
- Cephalothorax
- Abdomen
2 pairs of antennae
Swimmerets- appendages on abdomen used for swimming
Breathes by gills attached to swimmerets
One pair of large claw and 4 pairs of walking legs
Examples: Centipedes, millipedes, scorpions
Echinodermata
Name means skinny spine
Marine environment
Radial symmetry
Body parts are usually in pairs of 5's
Water vascular system
Tube feet
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Examples: Starfish, Sea Urchins, and sea cucumbers
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Annelida
Ex: Segmented Worms, earthworms, leeches
Body is divided into many sections
complete digestive tract
- Pharynx
2.Esophagus
- Crop
- Gizzard
- Intestine
Closed circulatory system
Blood stays within vessels
- Main Vessel is dorsal
- 5 aortic arches
Earth worm is a hermaphrodite
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Platyhelminthes
Examples: Falt worms, tapeworms, fluke
Many parasitic forms which causes different diseases in humans and livestock
Bilateral symmetry and Cephalization which is the concentration of sensory organs and nervous tissue in the head
One digestive opening to take in food and release waste
Most are hermaphrodites
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