The system that circulates blood through the body, consisting of the heart and blood vessels. In all vertebrates and certain invertebrates, the circulatory system is completely contained within a network of vessels. In vertebrates, the lymphatic system is also considered part of the circulatory system.
While a squirrel isnât going to pen the next bestseller or ace a calculus class, the squirrel is smart in his own way. When looking at animal intelligence, humans shouldnât judge animals by human standards.
Squirrels are like lawyers, rats and roaches. Theyâre determined, destructive and sneaky; they ransack and they pillage. Squirrels eat innocent seedlings down to the quick, bury nuts (just where nuts in the city come from is beyond me) in dirt, and for sport like to decapitate flower buds. They take all joy out of life. Nothing scares them, they wonât go away.