Are human cheek cells examples of plant cells, protist cells, or animal cells. How do you know?

Human cheek cells are examples of animal cells. Animal cells are eukaryotic and have no cell wall. They lack chloroplasts and cannot photosynthesize.

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answer:

p wave

explanation:

a qrs complex normally follows each p wave. a normal sinus p wave indicates that the electrical impulse responsible for the p wave originated in the sa node and that normal depolarization of the right and left atria has occurred