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Archives

Pumpkin Day! Thursday, October 26, 2006 |





Today was pumpkin carving day. Sarah and I had a perspective student tonight. After our great soccer game, we came home and carved pumpkins with Susie and little Sarah who live downstairs from us. Have a look at our creations!

Tubular Friday, October 20, 2006 |

So, we're in the throes of studying the digestive tract... Which is positively tubular. Literally. We're really just one long tube... With a bunch of stuff happening around it. Yup. Oropharynx, Laryngopharynx, esophagus, stomach, small intestine (duodenum - pronounced doo-ah-dee-num, jejunum, and ileum), large intestine (cecum, colon and rectum) and the double anal sphincter. That's pretty much it. Oh, there's a heart and some lungs and a brain and a few other things thrown in there too I suppose.
So... Anyone interested in what said doo-ah-dee-num looks like? Look no further. I present to you... A cross section of the duodenum:












And if you're still searching for something fascinating, try a kidney glomerulus. Say that three times quickly.













On a slightly different note, haven't you always been fascinated by membrane proteins? I thought so! Here's a spiffy picture of a beta barrel protein. It's like a tube of proteins that is inserted into a greasy cell membrane and allows certain non-greasy (remember... like dissolves like, so if it's not the same kind of substance, it's not going to dissolve easily) substance to move (selectively) across the membrane. For instance, ions like sodium and potassium and chloride all need a transmembrane protein to help them across the membrane.

Ahh, and amity is back in her comfort zone yapping about chemistry again.







And lastly, a little anatomy lesson is what you've all been waiting for, isn't it? Have a look at the picture below. It shows the growth progression of the gut for the embryo. Don't look too closely - but do notice that the intestines actually go OUT of the embryo and then back INTO the embryo during development. Wow. Pretty amazing. Every day I think about how incredible it is that so many of us are so normal. Nature is brilliant.

Cheers everyone.