Worms. Thats Right. Stupid Fucking Worms Flashcards
Worms that don’t have have a coelom and are there for called acoelomates
Flatworms
A thickened band of segments towards the anterior end of an earthworm which secretes a mucus cocoon into which sperm and eggs are released
Clitellum
The worm that grows in the appendages of its host and must be removed slowly by wrapping it around a stick
Guinea worm
Internal walls between each segment in an earthworm
Septa
Phylum of unsegmented round worms
Nematoda
Blood-sucking organisms which are part of phylum Annelids
Leeches
A body cavity which forms in more advanced animals
Coelom
This muscular structure in the gut of the earthworm grinds food into smaller pieces
Gizzard
Worms which cause the condition elephantiasis
Filarial
The phylum which includes worms which are flat
Platyhelminthes
Specialized excretory organs in segmented roundworms which filter fluid in the coelom
Nephridia
Small parasitic flatworms which live in the tissues of their hosts- like the liver or the blood
Flukes
The free living flatworm which we observed in a lab
Planaria
This coating on the outside of a tapeworm stops it from being digested by its host
Cuticle
Bristly, hairlike structures found on each segment of an earthworm which aid in movement
Setae
Most of a tapeworms body is made up of these types of organs
Reproductive organs
Structures which helps a tapeworm hang on in the intestinal tract of its host
Hooks
These parasitic roundworms live and mate in the intestines of their host- their larvae then burrow into the tissues and organs of the host to form cysts
Trichinella
Tapeworms don’t need this type of system
Digestive system
An organism which possesses both male and female reproductive organs
Hermaphrodite
A parasitic flatworm which lives in the intestinal tract
Tapeworm
Instead of a brain some flatworms may have these less complicated collections of nerve cells
Ganglia
This phylum contains segmented roundworms
Annelida
Repeating reproductive segments which make up most of a tapeworms body
Proglottids
Other structures which helps a tapeworm hang on in the intestine
Suckers
______________ roundworms have a pseudocoelom because that body cavity is only partially lined with mesodermal tissue
Unsegmented
A muscular tube which extends out of planaria worms for feeding
Pharynx
The head region of a tapeworm
Scolex
This structure is used to store food before it goes into the gizzard of the gut of an earthworm
Crop
Some flatworms have _____ cells which aid in excretion by removing excess water from the body
Flame cells
Annelids typically have a _______ circulatory system
Closed
A parasitic nematode which absorbs nutrients from the gut and in large numbers can partially or completely block the passage of food through the intestinal tract
Ascaris
Flatworms don’t have this which allows for unidirectional digestion which is more effective
An anus
Worms have what kind of symmetry
Bilateral symmetry
The flatworms
Platyhelminthes
The unsegmented roundworms
Nematoda
The segmented roundworms
Annelida