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the middle part of the mammalian small intestine.
the cell organelle responsible for manufacturing and transporting protein and lipids.
(also called an extinction event) the sudden dying out of large number of species over a short...
middle body tissue layer that forms the muscular, circulatory and excretory systems.
(also called herbivore) an animal that feeds directly on plant matter.
epithelial tissue that lines the inner spaces of the body or organs.