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what does humans are multicellular organisms mean?
how many types does a cell come in as?
skin cells together form what?
tissues are grouped to form which organs?
what does digestive system do?
what does the respiratory do?
what does the circulatory system do?
what does the excretory system do?
what does the skeletal/muscular system do?
where does digestive take place?
what does the digestive system consist?
what is digestive tract?
where does the digestive tract start?
what are the 2 types of digestion?
what is mechanical digestion?
what is chemical digestion?
what are the incisors?
what is the incisors job?
what happens after u bite of pieces small enough to chew?
what is the flap of skin called?
what does the epiglottis do?
