Unit 4: BIO111 SRU

Lophotrochozoan

Lophotrochozoan

species with a long thin tubelike body that lacks limbs

Rotifera

tiny pseudocoelomate suspension feeders named for the cluster of cilia at anterior end called a corona that waves in rotating patterns.

Animal Lineages

Sponge; Comb Jellies; Corals and jellyfish; protostomes; deuterostomes

Protostomes

live in virtually every aquatic and terrestrial habitat; can be detritivores

Adaptations protostomes have while transitioning to land

1. exchange gasses; 2. avoid drying out; 3. hold their own bodies under their own weight

3 Key Features of Arthropod Body Plan

Segmented body; Exoskeleton; Jointed Appendages

Sponges

Porifera

Comb Jellies

Ctenophora

Corals and Jelly Fish

Cnidaria

Trochophore

larva

4 major lineages of arthropod taxonomy

Myriapods; Crustaceans; Insects; Chelicerata

Protostome

embryonic development of the mouth before the anus

Protostome subgroups

Lophotrochozoa; Ecdysozoa

Deuterostome

embryonic development of the anus before the mouth

Echinodermata

sea stars and urchins

Hemichordate

acorn worms

Chordata

Cephalochordate; Urochordates and Vertebrates

Echinoderm

marine animal with spikes or spines

Water Vascular system

a series of branching fluid-filled tubes and chambers

Tube feet

elongated fluid filled jointed appendages that help organisms move

Cephalochordate

small torpedo shaped animals who suspension feed

Urochordates

organisms with sac-like bodies that have an external coat of polysaccharide

Pharyngeal Pouches

present in embryos develop into gills in aquatic species but not terrestrial species

Vertebrates

have dorsal hollow nerve cord that is elaborated into spinal cord

Spinal cord/nerve cord

bundle of nerve cells that run from brain to body’s posterior

Notochord

develops in all vertebrate embryos

Spinal cord and cranium

make up the central nervous system

Cartilage

strong flexible tissue consisting of scattered cells in gel-like-matrix of made of polysaccharides and protein fibers.