Essay and Weird Facts Flashcards
life cycle of centrocestus formusanus
Definitive host is wading bird, mating occurs in definitive host.
Host poops egg containing miracidium (ciliated larvae).
The miracidium hatch after being eaten by a snail. (snail is intermediate host)
Leave snail through either Redia or Sporocyst
Become cercaria, that then cyst in fish
Bird eats fish and cycle starts over
explain relationship between segmentation and tagmatization
Tagmatization is the fusing of body parts that allows specialization
why doesn’t radiation through time always mean greater complexity
a good example would be tapeworms/cestoidia that due to their lifecycle have selected away from a mouth and digestive tract - because their fitness does not require the complexity
Why do creatures molt?
Molting allows a creature to grow larger and also allows damaged issue to reform
Schistosoma
blood fluke that is #2 in socioeconomic devastation
Clonorchis
Chinese liver fluke, goes through snails, then free swimming, then fish, then humans
Pinworm Enterobius
itchy butt syndrome
Porkworms - Trichinella
Eating the muscle tissue of an infected organism passes the parasite onto another, damages muscles and tissues
Filarial Worms / Wuchereria
Mosquito bite, causes elephantiasis
heart worms / diroflaria
dogs/cats/etc - results in death
contracaecum
often found in fish in Texas, definitive host is birds or mammals
Horsehair worms / Nematomorpha
the mantids and horizontal gene transfer
