Spider Heart Beating
Spiders have hearts located dorsally on the abdomen. The heart is translucent, but appears black here because it is strongly contrasted with the yellow acid crystals that give the spider her opaque appearance. Three mammals appear on the soundtrack: a barking dog named Jovita, a male howler monkey, and me doing a howler imitation.
See the pulsating heart of a spider! Hear the roar of the jungle beasts! / quaoarpower Spinyback Orbweaver of Costa Rica Gasteracantha cancriformis and her squishy dorsal blood-pump!