★ Living Organisms Quiz
Blood is a fluid made up of several different parts. What level of structural organization BEST describes blood?
A. a cell
B. a tissue
C. an organ
D. a system
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In humans, the digestion process begins in
A. the intestine, with squeezing.
B. the mouth, with chewing and saliva.
C. the stomach, with churning and acid.
D. the esophagus, with pushing towards the stomach.
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