Undigested food is pushed out the body through the ___. rectum
esophagus
small intestine
gallbladder

Mucous membranes.. a. cover or line external surface of body. b. line internal body surfaces that are in contact with the environment. c. produce antibodies to combat infection. d. secrete sweat, which has antibacterial enzymes.

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Which a hammer strikes a compound formed by covalent bounds