This week we did a sheep's heart dissection. Tim took charge. Tom was able to stay and observe this time; I'm not sure why. Maybe a heart is less intrinsically gross than a brain or an eyeball. Amusingly, a sheep's heart seems to be significantly larger than it's brain, if we go by the sheep's brain we dissected a month or two ago.
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| Tom probes an atrium and is impressed by how deep it is. |
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| Tim bisects the heart, then holds it open to show the kids the heartstrings, or chordae tendonae, which connect the papillary muscles to the mitral valve and the tricuspid valve. When the muscles contract, the valves open. |
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| Tom jokes around with a fork. Mmmmm, delicious! |
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