Unit 2 Flashcards
What is the reproductive patterns of phylum Platyhelminthes?
-Most species are monoecious
-highly regenerative
-Asexual reproduction through fragmentation
-Sexual reproduction, internal fertilization via “penis fencing”
What is the body plan of Nemertea?
Bilateral
What are the tissues of the phylum Nemertea?
Triploblastic, acoelomate
What is the digestive system of Nemertea?
Protostome, complete digestive
What is the defining character of the Nemertea?
Eversible proboscis
-harpoons prey
-located in structure called rhynchocoel
-some have barbs
How do Nemertea move and eat?
Simple cephalization, most are carnivorous
What os the reproductive patterns of the phylum Nemertea?
-Highly regenerative
-Asexual via fragmentation
-Mostly Dioecious
Have gonads along the digestive tract
-typically exhibit courtship spawning
-external fertilization
-larvae, growth through several larval stages
What is the body plan of phylum Nematoda?
Bilateral
What are the tissues that Nematoda exhibits?
Triploblastic , Pseudocelomate
What is the digestive system of Nematoda?
Protosome, complete digestive
What is the common factor of superphylum Ecdysozoa?
-All species have cuticle as exoskeleton, all molt to grow
-Nematodes cuticle is made of collagen and chitin
How do they move?
Simple cephalization, mostly parasitic so don’t need much movement
Which two body systems are not in phylum Nematoda?
No Circulatory System, No Respiratory system
What two body systems are included in phylum Nematoda?
Excretory system, Nervous system
What is the reproduction patterns of phylum Nematoda?
Reproduction is species specific:
-monoecious
-dioecious
-parthenogenic
In dioecious species, fertilization is internal
