Nemertea

Question 1

Nemertea: Taxonomy

Answer 1

Triploblastic
Bilateria 
Protostomia
Spiralia 
Trochozoa
Nemertea

Question 2

Nemertea Defining Characteristic

Answer 2

Trochophore larvae

Question 3

Nemertea Common Name

Answer 3

Ribbon Worms

Question 4

Nemertea Habitat

Answer 4

Primarily marine, also FW or Terrestrial

Question 5

Nemertea Coelom

Answer 5

Both acoelomate and coelomate

- coelom comes from rhynchocoel which is a cavity for proboscis

Question 6

Nemertea: Rhynchocoel

Answer 6

Space that houses the proboscis

Question 7

Nemertea Circulation

Answer 7

Closed system using hemoglobin
No true heart but defined blood vessels
Lack one way valves so blood flows erratically by muscle contraction

Question 8

Nemertea Body Plan

Answer 8

Distinct layers of muscle: circular and longitudinal (arranged like human intestines)
Longest animal on planet
Relatively flat and thin so gas exchange can occur through body

Question 9

Nemertea excretion

Answer 9

Protonephridia: primitive kidneys; dead end cells aka flame cells in Platyhelminthes, Nemertea, and Rotifera

Question 10

Nemertea Proboscis

Answer 10

Fluid pressure extends proboscis
Inverted when returns (eversible)
Can be sticky, have multiple parts, or have a stylet

Question 11

Nemertea Stylet

Answer 11

Spike on end of proboscis used to stab prey