BIO 2135 Lecture 14: Lecture 14 - Arthropods and echinoderms
22 Mar 2017
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Rewatch lecture you missed so much sleepy head. Waterproof case of sperm placed inside female track. In ovarioles, lowest is most mature, then next most etc. Assembly line of eggs, once one gets put, then next is ready. 50 ovarioles in 1 ovary and 50 in the other, half and half. Receive sperm from male and it is stored in spermatheca. As eggs pass in front, sperm is released. Eg female only mates with each male once, tries to mate with as many as she can. Keeps all the sperm and then makes all dem babies. Sperm goes through sperm duct, stored in semival vesicles. Need to get as much water as possible. Pumps k into the lumen of tube, potassium is positively charged. Need to recover minerals used in this system. Opposite happens, k+ goes out, cl- goes out, h2o goes out. Even one that opens up it"s butthole and water goes through their highly concentrated.
