Saliva is a part of the digestive system. saliva contains enzymes that help start the breakdown of food in the digestive process
The three kind of landforms found on Earth are mountains<span>, </span>plains<span> and </span>plateaus<span>.
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Answer:
Cells and tissues are both structurally introduced in all organism and both have equal importance. There are no tissues without the cells and cell make-up the different types of tissues in all multicellular organisms. A cell is mainly found in every living organism.