Hollow, central body cavity with only one opening (cup shaped) “tube within a tube”
Nematocysts – special stinging structures around the mouth
Phylum CnidariaCnidarians
Sexual and asexual reproduction
radial symmetry
Phylum PlatyhelminthesFlatworms
Flat bodies Regeneration –
grows part back digestive tract is
tube
Phylum PlatyhelminthesFlatworms
Live in ponds and streams, bottom of plants or rocks
Some live in animal or human host, others are freeliving
Phylum NematodaRoundworms
Resemble strands of spaghetti
Live on land or in water
Can be parasites
Phylum NematodaRoundworms
Have both a head end and a tail end with a digestive tube for food entrance and exits
Phylum AnnelidaSegmented worms
Ringed Body is divided into several rings
or segments – at least 100
Phylum AnnelidaSegmented worms
Setae – bristles that help the worm to move
Earthworms’ wastes enrich soil
Phylum Arthropoda
Largest phyla of all animals All have jointed legs,
exoskeleton, segmented body
Crustaceans
Shed their exoskeleton (molting)
Live in water and have gills
Can regenerate some parts
Centipedes and Millipedes
Centipedes have one pair of legs in a segment and are carnivores
Millipedes have two sets of legs in a segment and are herbivores
Arachnids
Bodies are divided into two main sections: A head-chest section and an abdominal section
All have 8 legs Only arthropod w/o
antennae
Insects
Body is divided into three main sections: head, thorax (chest), and abdomen
Has three pairs of legs, antennae, and most have wings
Insects
Open circulatory system
Shed their exoskeleton as they grow
Insects
Metamorphosis stage changes (egg to larva to pupa to adult)
Pheromones – powerful chemicals released to attract a mate
Phylum MolluscaMollusks
All have soft bodies All have a mantle to produce
shell
Univalves/Gastropods (one-shelled)
Live in ocean, freshwater, or on land (need moisture)
Radula files off bits of plants
Univalves/Gastropods (one-shelled)
Some inject poison, dangerous to people
Moves along mucus
Bivalves (two-shelled)
Move by clapping the two shells together
Bivalves (two-shelled)
Bivalves are often called filter feeders because they spend most of their time straining water for food
Tentacled/Cephlopods
Have some part of a shell within their body (except nautilus)
Tentacled/Cephalopods
Number of tentacles for capturing food varies
Water jet propulsion for movement
Phylum EchinodermataEchinoderms
Name means “Spiny-skinned”
Regenerate lost/broken body parts
Phylum EchinodermataEchinoderms
Water vascular system
five-part radial symmetry
You are done with the notes.
Now you have everything you NEED to be ready for next week’s test. There is no excuse to do poorly - you have a week to prepare and memorize these facts!