Platyhelminths - Flatworms Flashcards
Symmetry, blastia and coelom
Bilateral + Triploblastic + Acoelomate
What is unique to the class Turbellaria
They are free-living
Where is the mouth in Turbellaria
At the end of the muscular pharynx on the mid-ventral surface
Outline feeding in Turbellaria
Digestive enzymes are released and the food is sucked up by the everted pharynx where it is then moved to the gastrovascular cavity so digestion can continue
Describe the CNS in Turbellaria
Neural ganglia located at anterior end represent a brain while ventral nerve cords run along the length of the body
Photosensitivity in Turbellaria
Eye spots at anterior end
How do Turbellaria move
Cilliated epithelial layer on ventral epidermis glide along secreted mucous
Asexual or sexual reproduction in Turbellaria
Both
What are the cells involved in the excretory system in Turbellaria
Flame cells
How do Trematodes live and give 1 example
Endoparasitic
Liver and blood flukes
How do Monogeneans live and give 1 example
Ectoparasites
Gill and skin flukes
What is the posterior adhesive organ in Monogeneans called
Haptor
Lifecycle of monogeneans
Eggs are released and hatch into larval stage which attaches to a host and develops into an adult
Indirect life cycle of Trematoda
1 intermediate stage with 1 intermediate host
Where are the 2 suckers for attachment in Trematoda
1 at oral region and 1 at ventral region
