BIOL 111 Lecture Notes - Lecture 14: Sarcomere, Nematomorpha, Myocyte

• School: McGill University
• Department: Biology
• Course: BIOL 111
• Professor: All

Document Summary

Priapulid worms: marine, known since cambrian period, found in bc. Adults are free living, can reach 2m long. Loricifera: very small, live in marine sediments, discovered in 1980s. Can survive extreme temperatures, were sent into space to study the behavior of life. Called the most indestructible organisms of the planet. Onychophora: velvet worms , found in tropical environments: hunting technique: paralyze the prey. Myriapodes: may be found here in montreal. Dysticus = predaceous diving beetle, adults collect air under the wings and use this to breathe under water. Honey bee has a highly complex social life worker bees dance to communicate location of new food source. They have a cephalothorax and abdomen (like a crayfish) Jointed appendages for specialized function: rigid exoskeleton ecdysozoans grow by moulting and lophotrochozoans grow incrementally, non-living, secreted by epidermis, covers all external surfaces, digestive tract and trachea, composed of layers, chitin, protein + caco3.