Nemertea

Question 1

What kind of coelom do Nemerteans have?

Answer 1

True coelom, rhinocoel

Question 2

Are Nemerteans segmented?

Answer 2

No

Question 3

Do they have a complete gut?

Answer 3

Yes

Question 4

Closed or open circulatory system?

Answer 4

Closed, with cephalic and anal lacuna

Question 5

What kind of nervous system? Describe different parts.

Answer 5

ladder-like, circumproboscis nerve ring, central ganglion, cerebral organ, cephalic slit, ocellus

Question 6

Dioecious or monoecious?

Answer 6

Dioecious

Question 7

Can they reproduce asexually?

Answer 7

Yes, by fragmentation or regeneration

Question 8

What system is impermanent?

Answer 8

Impermanent reproductive organs

Question 9

Do they have an excretory system?

Answer 9

Yes, clusters of protonephridia

Question 10

How does a Nemertean move its proboscis?

Answer 10

With the retractor muscle, contracted to retract, relaxed to evert

Question 11

Are Nemerteans ciliated?

Answer 11

yes

Question 12

What types of muscles do they have?

Answer 12

Longitudinal, proboscis retractor

Question 13

What kind of tissue takes up the majority of the body?

Answer 13

Mesenchyme