Professor Aris Thorne adjusted his magnifying loupe and peered at the wriggling creature on the leaf. "Class," he announced, tapping his clipboard, "today we dissect a living machine. The caterpillar. Its parts, viz.:
"Now look here, viz. the prolegs —stubby, unjointed fleshy protrusions on segments three through six, plus the last segment. See the tiny hooks? Crochets . They act like Velcro, anchoring the animal to silk pads or rough bark. Without them, it would fall at the first breeze." caterpillar parts viz
A student raised a hand. "Professor, which part is most important?" Professor Aris Thorne adjusted his magnifying loupe and
"Along the abdomen, viz. a row of tiny dots— spiracles . Air enters here, travels through tracheal tubes, and delivers oxygen directly to the tissues. No lungs. No blood circulation for gas exchange. Just plumbing." Its parts, viz
"Note the six pairs of simple eyes, called stemmata . They don't see images—only light and shadow. And those tiny antennae? They taste the air. But the real marvel, viz. the mandibles —horizontal jaws that shred leaves like botanical scissors."