313
edits
Tapeworm: Difference between revisions
From CreationWiki, the encyclopedia of creation science
Jump to navigationJump to search
no edit summary
No edit summary |
|||
| Line 39: | Line 39: | ||
==Anatomy== | ==Anatomy== | ||
The tapeworm is a long(6m or 20 ft.), soft-bodied, legless invertebrate with bilateral symmetry.[http://en.wikipedia.org/wiki/Tapeworm#Body_Systems] They are made up of a knob-like head or scolex(where most of the sensory organs are located-cephalization), a short, unsegmented neck following the scolex, and multiple flat, rectangular body segments or proglottids forms the [[strobila]]. On the external surface of the scolex there are hooks or suckers that allow the tapeworm to latch onto the inside of a host's intestines where it lives for most of its adult life.[http://www.factmonster.com/ce6/sci/A0861442.html] Adult tapeworms have no external cilia or flagellum. The worm's body covering consists of a thick tegument which protects it from the digestive juices of its host.(Porch, p458) | [[File:Tapeworm_scolex.jpg|left|250px]]|human tapeworm<br /> (''Taenia solium'')<br /> The tapeworm is a long(6m or 20 ft.), soft-bodied, legless invertebrate with bilateral symmetry.[http://en.wikipedia.org/wiki/Tapeworm#Body_Systems] They are made up of a knob-like head or scolex(where most of the sensory organs are located-cephalization), a short, unsegmented neck following the scolex, and multiple flat, rectangular body segments or proglottids forms the [[strobila]]. On the external surface of the scolex there are hooks or suckers that allow the tapeworm to latch onto the inside of a host's intestines where it lives for most of its adult life.[http://www.factmonster.com/ce6/sci/A0861442.html] Adult tapeworms have no external cilia or flagellum. The worm's body covering consists of a thick tegument which protects it from the digestive juices of its host.(Porch, p458) | ||
Almost all of the tapeworm's metabolism is dedicated to reproduction; inside the scolex is a complete set of male and female reproductive organs. There are hardly any sensory organs in an adult tapeworm, the nerve center of a tapeworm is its scolex as well as a nerve cord running the length of the body even through the proglottids(they stop working upon detachment). They also have an excretory canal which is the only digestive system associated organ. The tapeworm has no organs for respiration or circulation and achieves this on a cellular level.[http://www.newworldencyclopedia.org/entry/Tapeworm] Each proglottid fertilizes and stores hundreds of eggs, the more mature proglottids are at the posterior end of the tapeworm. Proglottids that break off are called terminal proglottids.(Porch, p458) | Almost all of the tapeworm's metabolism is dedicated to reproduction; inside the scolex is a complete set of male and female reproductive organs. There are hardly any sensory organs in an adult tapeworm, the nerve center of a tapeworm is its scolex as well as a nerve cord running the length of the body even through the proglottids(they stop working upon detachment). They also have an excretory canal which is the only digestive system associated organ. The tapeworm has no organs for respiration or circulation and achieves this on a cellular level.[http://www.newworldencyclopedia.org/entry/Tapeworm] Each proglottid fertilizes and stores hundreds of eggs, the more mature proglottids are at the posterior end of the tapeworm. Proglottids that break off are called terminal proglottids.(Porch, p458) | ||
