Majors animal: Anatomy of a tapeworm
Quiz yourself by thinking what should be in
each of the black spaces below before clicking
on it to display the answer.
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| Scolex | Anterior end of a tapeworm; lacks sensory structures but possesses modifications for attachment to intestinal wall of host
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| Hooks and suckers | Modified structures on scolex for attachment to host
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| Neck | Constricted portion signifying posterior end of scolex; marks the site of origin of immature proglottids
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| Immature proglottid | Newly produced segment of the tapeworm that has undeveloped reproductive organs
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| Excretory canals | Longitudinal channels running along the outer margins of the body that deliver metabolic waste products out of the tapeworm
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| Mature proglottid | Tapeworm segment that has functional reproductive organs
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| Yolk gland and yolk duct | Ova are combined with yolk and shelled before passing to the uterus
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| Uterus | Shelled, fertilized ova are stored here until proglottid drops off of tapeworm body
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| Ovary | Produces ova
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| Vagina | Point of entry into female reproductive tract through which sperm travel to reach ova; joins with the genital pore
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| Testes | Produce sperm
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| Vas deferens | Canal through which sperm pass as they exit the proglottid through the genital pore
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| Genital pore | External opening common to the male and female reproductive tracts of the tapeworm; sperm exit and enter proglottids through this opening
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| Gravid proglottid | Tapeworm segment containing ripe fertilized ova; this segment is ready to drop off the tapeworm body and be eliminated from the host in feces
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