Chapter 27 Flashcards
Fluid filled body cavity lined with mesodermal tissue
Coelom
Coelom in flatworms
Acoelomates
How does the coelom affect movement?
It makes it more efficient
Feeding structure in flatworms
Pharynx
Respiration, circulation, and excretion in flatworms
Diffusion
Flame cells in flatworms (what do they do?)
Remove waste
Muscular tube that pumps food into the digestive cavity (flatworms)
Pharynx
Groups of nerve cells that control the nervous system and respond to the environment
Ganglia
Detects light for flatworms
Eyespot
Two movement structures in flatworms
Muscles and cilia
Group of flatworms that are free swimming bottom dwellers
Tubellarians
Example of a tubellarian
Planarian
Two structures in flatworms response
Ganglia and eyespot
Group of flatworms that are parasitic
Flukes
Example of a fluke
Trematoda
Group of flatworms that are parasitic to humans and have special heads, segments, and reproductive structures
Tapeworm
Male reproductive organs in tapeworms
Testes
Head of a tapeworm that hooks to the intestines
Scolex
Segments of a flatworm
Proglottids
Unsegmented worm with tapering ends
Roundworm
Coelom in roundworms
Pseudocoelom
What makes the coelom in roundworms pseudo?
It is only partially lined by the mesoderm
Openings on a roundworms
Mouth and anus
Structures in roundworms feeding
Grasping mouth parts and spines
Respiration, circulation, and excretion in roundworms
Diffusion