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a microscopic hair-like extension of the cell membrane of the epithelial cells forming the outer layer of the villus.
small groups of cells found in the pancreas that secrete the hormones insulin and glucagon.
a duct through which saliva passes from the salivary gland into the mouth.
a multi nucleate (many nuclei) cell resulting from cell fusions of uninuclear cells.
a liquid-filled body cavity formed within the mesoderm of some animals. The cavity occurs...
the structure that separates the right ventricle from the pulmonary artery. It prevents the...