Elliot had a
slide of the lymphatic system up on the screen behind her, and there was a strange-looking
slab of meat rested on each lab table. She bounced on her toes before beginning.
"Okay guys, today we are learning about the
lymphatic system. It's a little more complex than what we've covered so far, but I know you're up for it, so let's just jump in. The lymphatic system has three functions - it removes extra fluids from body tissues, absorbs fatty acids and transports fat to the circulatory system, and makes immune cells, like lymphocytes."
"The important parts of the lymphatic system are the cervical nodes, lymph vessels, thymus, axillary nodes, tonsils, spleen and inguinal nodes. You can remember them with the mnemonic, 'Children like to ask teachers sexual idioms.' " She went on with her lecture for a bit; when she was nearly done, her fingers went to the side of her throat. "If you have a tiny bit of a cold, or sore throat, or whatever, you can probably feel your cervical nodes, here. Don't press too hard, you could end up knocking yourself out." Her hands fluttered down to her sides.
"I just wanted to focus on one part of the system with more detail than your textbook covers, and that is the magnificent
spleen. It's a ductless, vertebrate organ, and even though it's part of the lymphatic system, it's also associated with the circulatory system, where it helps destroy old red blood cells and holds a reservoir of blood. And what's really cool is that for a long time, no one really knew why we had it? But now we're figuring out that its absence can make you get some infections. Oh, and also, one in ten of you has an extra teensy spleen or three. It's harmless, just a little quirk that forms where the nerves and blood vessels enter the main spleen. It's all almost as cool as the endocrine system."
She pointed to the slabs on the tables. "Now strap on gloves and goggles, get into groups, and get to cutting up these
cow spleens. You're looking for the splenic artery, the splenic vein, and the renal, colic and stomach areas."
[OOC: Wait for OCD, and blame the spleen thing on
bugofjustice.]