the.com/camelid

The family tree where camels, llamas, and alpacas all refused to fully commit to one hump count.

means A member of the biological family Camelidae — camels, llamas, alpacas, guanacos, and vicuñas, all even-toed, long-necked mammals adapted for tough terrain.

from Built from Latin 'camelus' (camel), itself borrowed from Greek 'kamēlos', which in turn likely came from a Semitic source — compare Hebrew 'gamal' and Arabic 'jamal'. Tack on the scientific-sounding suffix '-id' (from Latin '-ida/-idae', used to name biological families) and you get the tidy taxonomic label that quietly includes the camel's South American cousins, who've never seen a desert in their lives.

blood cells
Oval-shaped, not round, so they never rupture
spit weapon
Actually regurgitated stomach contents, not saliva
antibodies
Tiny single-chain ones scientists now mine for drugs
origin
Evolved in North America, then left entirely
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