Puzzle 11

__ system; organs that fight off disease

Jesters in a deck

Made a low, humming sound, like a bee

Of Mice __, Steinbeck classic

__ food, pop-up stalls for snacking

Serious, grave, critical

Polar explorers cross ice by this transport method

Four-stringed round "guitars" for plucking

Pearls of __; sound advice

__ Planet, Attenborough nature film on the Poles

This hat is actually made in Ecuador