Platyhelminthes Flashcards
1
Q
symmetry
A
bilateral
2
Q
tissue layers
A
ecoderm,mesoderm, and endoderm
3
Q
digestive tract
A
incomplete (1 opening contains mouth and anus)
4
Q
Reproductive
A
Hermaphroditic-famale and male
5
Q
fertilizations
A
internal
6
Q
Nerve system
A
They evolve first nerve cells (contain dedicated nerve cells), cephalized (develop a head), no ganglia, no brain.
7
Q
Excretory system
A
composed of flame cells which is non-selective). It dispose of metabolic waste, but also nutrients.
8
Q
C. Trematoda
A
- blood vessel of vertebrates
- digenic flukes(contain 2 hooks in life cycle)
- ex. blood flukes
9
Q
C. Cestoda
A
- tapeworm
- their body segments grow bigger and bigger. It doesn’t have digestive tract and absorb digestive product of the host. They break off at the end. They can get up to 70 feet long. They are flat and don’t have that much mass.
10
Q
C. Turbellaria
A
-free living non parasitic flatworm
