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U5SG - Tracheal system Why don't insects have lungs What is...

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Unit 5 - Maintenance and Movement Study Guide Unit objectives: 1. Describe embryonic origin of alimentary canal divisions. 2. Draw and label generalized alimentary canal and describe function of each component. 3. Draw and label generalized insect circulatory system and describe circulation pattern. 4. Describe the tracheal system of insects and define trachea, tracheoles, and taenidia. 5. Describe how insects maintain proper body temperature and how they keep from freezing. Introduction Alimentary Canal Fill out the functions for the digestive structures. Table 1 Structure Function preoral cavity pharynx esophagus salivary gland crop proventriculus midgut gastric caeca Malphigian tubules* peritrophic membrane ileum colon rectum anus
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