trematodes 2
Terms
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- Trematodes have a body that is _____.
- flattened, elongated and leaf like
- schistosomes
-
-only exception to flattened trematode bodies
-ovoid, conical, and cylindrical bodies - Trematotodes have muscular suckers and spines located
- anteriorly and ventrally that are used for the attachment to the host
- Trematodes have layers of muscles beneath the integument used to
- alter the shpae of the worm by contraction, elongation and flexion
- Trematodes contain an intervening space b/w
- the carious organs that is filled with fluid and a network of connective tissue cells and fibers
- Trematodes do not have a _____ ______, but have a ___________________ that constits of a muscular, globular pharynx that bifurcates to form 2 posterior lobes: schistosomes are an exception (they lack a pharynx)
- body cavity; have a digestive tract
- How is nutrition obtained?
- From the hosts tissues, secretions or intestinal contents
- The integument absorbs ___ and excretes _____ and ___.
- carbohydrates; metabolites and mucus
- Trematode excretory system consists of
- flame cells, capillaries, connecting tublues, a bladder, and an excretory pore
- Nervous system is composed of
- 2 lateral ganglia near the pharynx and longitudinal nerve fibers extending anteriorly and posteriorly throughout the fluke body
- Trematodes are hermaphorditic which means
- their reproductive system consists of ovaries and testes present in each indidual
- Schistosomes are dioecious
- dont have overies and testes in each individual
- Eggs are
- released when mature into the body cavities of their host
- Life cycle includes
- a snail host and asexual multiplication
- Life span
- can cover several years or up to 30 years with the schistosomes