What is the definition of the cell theory? It states that: A)The cell is the basic structural and functional unit of all living organisms.
B)All cells have a plasma membrane and genetic material called DNA C)Eukaryotic cells are larger than prokaryotic cells. D)Organisms are made of one or more cells, cells are the basic unit of life, and all cells come only from other cells
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blood enters the heart through two large veins, the inferior and superior vena cava, emptying oxygen-poor blood from the body into the right atrium of the heart. as the ventricle contracts, blood leaves the heart through the pulmonic valve, into the pulmonary artery and to the lungs where it is oxygenated.

igneous rocks are formed by solidification of cooled magma (molten rock), with or without crystallization, either below the surface as intrusive (plutonic) rocks or on the surface as extrusive (volcanic) rocks.  

the composition depends on the source magma. there are almost a thousand types of composition found till now.  

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answerall of the above;