Chordates

what are the 5 characteristics of chordates?

Pharyngeal gill slits, dorsal hollow nerve cord, post anal tail, notochord, endostyle/thyroid

What do the gill slits do?

Dorsal hollow nerve cord

endostyle

remove deoxygenated water

neural tube, forms from ectoderm, becomes the cns in vertebrates

organ for filter feeding, produces mucous, becomes thyroid

What does hemi chordata mean, what are they, what are the two chordate traits and the other shared one?

What are the 3 segments of the acorn worm?

What’s special about circulatory?

How do they reproduce?

half string, marine worms that burrow, slits and nerve cord and dorsal extension of pharynx

Acorn shaped probiscus (burrows and collects food), collar region with mouth, trunk that possesses nerve cords

true and no heart, no pigmented blood, dorsal and ventral vessels

dioecious and external fertilization and both direct and indirect

Who are the Pterobranchs?

What are their body segments?

deep water, colonial, asexual, secretes rigid tubes worms

ciliated proboscis that acts as a shield, collar that contains ciliated tentacles, trunk with a u shaped digestive

INVERVEBARTE CHOARDATES

lanclets

tunicates

hagfish

translucents marine chordates

sea squirts, sessile

skull but no vertebral column

What does Cephalochordata mean, diet, reproduction?

What does the tunica do for tunicates, diet?

Tunicates circulatory, pharyngeal gills, sea aquirts?

Tunicates tadpole characters?

Diff between solitary and colonial species?

head string, fish like filter feeders (gill slits for eating), Dio and external

acts as exoskeleton, filter feeders

heart reverses beat / no oxygen carrying cells, feeding and gas exchange / cilia for water flow, muscle contractions to squirt water

all chordate aspects, can’t feed, notochord gets absorbed,

Sol = two siphons water and waste and external fert

Col = share tunic and waste siphone and buds to expand colonies