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3 types of symmetry?
asymmetrical, radial, bilateral
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3 skin layer types
Endoderm mesoderm ectoderm
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acoelomate
Does not have a coelom
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pseudocoelomate
coelom is not completely lined with mesoderm. (fake coelom)
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get to know that there polyp
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Digestive track develops mouth first
protostome
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Digestive track develops butt first
deuterostome
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external skeleton,
molting required for growth
ecdysozoans
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ecdysozoans
External skeleton, molting required for growth
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lophotrochozoans
ciliated larval stage
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ciliated larval stage
lophotrochozoans
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The evolution of the major animal phyla involves 4 key divergences.
- 1 a) asymmetrical & lack of true tissues
- b) symmetrical & true tissues
- 2 a) radial symmetry & diploblastic (2
- embryonic tissue layers)
- b) bilateral symmetry & triploblastic (3
- embryonic tissue layers)
- 3 a) protostomes (digestive tract develops mouth first)
- b) deuterostomes (digestive tract develops anus first)
- 4 a) ecdysozoans (external skeleton,
- molting required for growth)
- b) lophotrochozoans (ciliated larval stage)
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Porifera
- They're sponges, sucka!
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What fall under LOPHOTROCHOZOAns?
- Platyhelminthes
- Annelida
- molluska
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Platyhelminthes
Annelida
molluska
lophotrochozoans
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Nematoda
Arthropoda
ECDYSOZOA
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Echinodermata
Chordata
Deuterostomes
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PROTOSTOMES
- LOPHOTROCHOZOAPlatyhelminthes
- Annelida
- molluska
- ECDYSOZOANematoda
- Arthropoda
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osculum
- large opening to spongocoel
- where water exits in porifera (sponges)
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large opening to spongocoelwhere water exits in porifera (sponges)
Osculum
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choanocytes
Feeding cells in porifera
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Feeding cells in porifera
Choanocytes
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Ostium
incurrent pore in porifera
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spongocoel
not clearly defined on slide, but it seems pretty self explanatory, it's a large open space in porifera think "coelum"
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not clearly defined on slide, but it seems pretty self explanatory, it's a large open space in porifera think "coelum
spongocoel
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spicules
Skeletal elements in porifera.
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Skeletal elements in porifera.
spicules
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Key body plan of porifera
- asymmetrical
- lack of true tissue
- spongocoel
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Cnidaria
Jellyfish, Sea Anemones, Hydra, Coral
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Jellyfish, Sea Anemones, Hydra, Coral
Cnidaria
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Key Body plan of Cnidaria.
- Radial
- diploblastic
- gastrovascular cavity
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cnidocytes
stinging cells that cnidaria have
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stinging cells that cnidaria have
cnidocytes
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2 distinct body forms of cnidaria
- Polyp and medusa
- Polyp has it's anus in the air
- Medusa looks like a jelly fish and it decently hides it's anus.. that's probably why you like it more. It has class. Fuck that polyp.
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Platyhelminthes
- Planaria (non-parasitic and so fucking cute)
- Tapeworms and Flukes (parasitic)
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Planaria (non-parasitic and so fucking cute)Tapeworms and Flukes (parasitic)
platyhelminthes
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Key body plan of platyhelminthes
- -bilateral symmetry
- -triploblastic
- -gastrovascular cavity
- -acoelomate
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-bilateral symmetry -triploblastic-gastrovascular cavity-acoelomate
body plan for platyhelminthes
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Mollusca classes
- Gastropoda snails and slugs
- Cepholapoda Squids and octopi, you is a ho if you don't remember this
- Bivalvia clams oysters scallops muscles
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Gastropoda snails and slugsCepholapoda Squids and octopi, you is a ho if you don't remember thisBivalvia clams oysters scallops muscles
Mollusca classes
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Key Body Plan for molluska
- - bilateral symmetry
- - triploblastic
- - alimentary canal
- - coelomate
- - protostome
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- bilateral symmetry - triploblastic- alimentary canal- coelomate- protostome
body plan for molluska
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Other features of molluska
- a soft body with a muscular “foot”
- - a “mantle” that produces a protective shell for the soft body
- - a rasping tongue called a “radula”, absent in bivalves
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Annelida
Earthworms, Leeches, and Polychaetes
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Earthworms, Leeches, and Polychaetes
Annelida
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Body plan for annelida
- - bilateral symmetry
- - triploblastic
- - alimentary canal
- - coelomate
- - protostome
- - segmentation
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Other features of annelida
- polychaetes have paired, fleshy appendages on each segment called “parapodia”
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- - eathworms and polychaetes have
- bristles called “chaetes”
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Arthropoda subphylum
- Chelicerata
- myriopoda
- crustacea
- hexapoda
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spiders,
scorpions, mites, ticks, horseshoe crabs
chelicerata
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Chelicerata
- spiders,
- scorpions, mites, ticks, horseshoe crabs
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Myriopoda
- millipedes and centipedes
- - 1pair of antenna
- - head and elongated trunk
- - one pair of legs per trunk segment (centipede) or two pairs of legs per trunk segment (millepede)
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millipedes and centipedes- 1pair of antenna- head and elongated trunk- one pair of legs per trunk segment (centipede) or two pairs of legs per trunk segment (millepede)
Myriopada
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Crustacea
- crabs,crayfish, shrimp, pillbugs,
- barnacles
- 2 pairs of antennae
- Biramus (2-lobed) appendages
- Carapace (common covering over head and thorax)
- - compound eyes usually on stalks
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crabs,crayfish, shrimp, pillbugs,barnacles2 pairs of antennaeBiramus (2-lobed) appendagesCarapace (common covering over head and thorax)- compound eyes usually on stalks
Crustacea
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Hexapoda
- - 1 pair of antenna, 4 pairs of feeding
- appendages
- - 3 pairs of legs, 2 pairs of wings (or wings absent)
- - 3 main body divisions (head, thorax, abdomen)
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Anthropoda key body plan
- - bilateral symmetry
- - triploblastic
- - alimentary canal
- - coelomate
- - protostome
- - segmentation
- - ecdysis(have a hard outer cuticle that must be shed periodically to allow for growth)
- an exoskeleton containing chitin
- - jointed appendages
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Nematoda
- Worms shaped like hooks
- -bilateral symmetry
- - triploblastic
- - alimentary canal
- - pseudocoelomate
- - protostome
- - ecdysis (hard outer cuticle that must be shed periodically for the animal to grow)
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Echinodermata
Starfish, Sea Urchins, Sand Dollars, Sea Cucumbers
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Echinodermatata body plan
- - radial symmetry (pentaradiate)
- - triploblastic
- - alimentary canal
- - coelomate
- - deuterostome
- Tube feets!
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Male fruit flies
Have dark short abdomens
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