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Big Boy Invertebrate Words - Coggle Diagram
Big Boy Invertebrate Words
Proferia
Porifera means “pore bearing”
Asymmetry (none)
Sessile: live attached to a surface
Do not have nerve cells or tissue
Arthropoda
Largest phylum - found in almost all places on earth
Characteristics:
exoskeleton
Outside the body
Very good protection
Does not grow, so it must shed periodically (molting)
Annelida
Examples: segmented worms, earthworms, leeches
Body divided into many segments
Complete digestive tract
Pharynx
Esophagus
Crop
Gizzard
intestine
Mollusca
Gastropods (“stomach-footed”)
Univalves: one shell, breathe with lungs; examples: snail
Bivalves: two shells, breathe with gills; example: clam
Cephalopods (“head
E. Sexual reproduction: most have separate sexes, some are hermaphrodites
F. Most have an open circulatory system (blood is contained within vessels that empty into sinus cavities)
Cephalopods have a closed system (blood remains within vessels)
Platyhelminthes
Many parasitic forms-cause many diseases of people and livestock
Bilateral Symmetry and cephalization (concentration of sensory organs and nervous tissue in the head)
One digestive opening (pharynx) to take in food and release waste - most don’t need complex digestive systems because food has already been digested by their host
Most are hermaphroditic, some can regenerate lost body parts.
Echinodermata
Name means “spiny skin”
Marine environment
Radial symmetry
Larvae have bilateral symmetry
Deuterostomes - indicates a fairly close relationship to vertebrates
Comparing Invertebrates
Specialized cells, tissues, and organs
Cnidaria
Cnidocytes: cells that contain stinging poisonous barbs with which they paralyze prey
Radial symmetry (division of 5 equal parts)
Two body forms
Polyp: sessile, tentacles up-coral, hydra
Medusa: free swimming, tentacles down-jellyfish