Module 3.2: Platyhelmintes

Question 1

Type of Symmetry

Answer 1

Bilateral

Question 2

Cephalization

Answer 2

Nervous system is concentrated on the “head”

Question 3

Movement is _______

Answer 3

Directed

Question 4

Platyhelmintes are _____blastic

Answer 4

TRIPLO-blastic

Question 5

2 major groupings of Triploblastic animals

Answer 5

Protostomia & Deuterostomia

Question 6

What is the defining feature of Phylum Platyhelmintes?

Answer 6

Syncytial tegument / Neodermis;
Is said to be polyphyletic however as there is no unique defining feature

Question 7

Syncitial Tegument

Answer 7

Tegument is a term in helminthology for the outer body covering of members of the phylum Platyhelminthes. The name is derived from a Latin word tegumentum or tegere, meaning “to cover”.
A syncytium or symplasm is a multinucleate cell which can result from multiple cell fusions of uninuclear cells

Question 8

Type of Mesoderm Formation

Answer 8

Acoemolate

Question 9

4 classes

Answer 9

Turbelleria
Cestoda
Monogenea
Termatoda

Question 10

Ganglia

Answer 10

Dense cluster of nervous tissue found in the anterior

Question 11

Ocelli

Answer 11

Light sensitive “eye spots”

Question 12

Parenchyma

Answer 12

Tissue that packs the spaces of the body

Question 13

Hermaphrodite

Answer 13

Organism has both the male and female sexual organs

Question 14

Cell name for the Osmoregulatory system of a Platyhelminthes

Answer 14

Flame cell / Protonephridia

Question 15

Rhabdites

Answer 15

Mucus-secreting dual-gland adhesive organs

Question 16

Statocysts

Answer 16

Fluid-filled sac responsible for “balance” of the organism