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Unformatted text preview: Arthropods have hard skin/shells which make them vulnerable when they shed them. Metanephridia are in arthropods. This is where the digestive and excretion systems are connected because they have to retain as much water as they can. The structure connecting the excretory system and digestive system connecting structure try to reabsorb as much water as possible and recirculate them through the body via the circulatory system. They have full digestive systems, enzymes to digest food.etc. They convert their ammonia to acid which is a less toxic waste. They have a ventral nerve cord. They also have a complex sensory system. They have both compound eyes and simple eyes (ocelli). The ocelli have the ability to get information of light intensity. Grasshoppers have 3 of them. The lobsters have an antennae that are extensions of their sensory system which give them not only tactile information but also chemical information. Reproduction is sexual with different sexes. Since fertilization is internal there is a complex of behavior to ensure better fertilization to show that males and females are ready to...
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This note was uploaded on 04/26/2010 for the course BIO 102 taught by Professor May,wolbach,beckerman during the Spring '10 term at University of the Sciences in Philadelphia.
- Spring '10