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the first part of the intestine, from the pyloric valve of the stomach to the caecum. It consists of the duodenum, jejunum and ileum.
fats that are liquid at room temperature. They are found in plants.
an international agreement to phase out the use of CFCs, signed by 49 countries in Montreal,...
convolutions of the inner membrane of mitochondria.
epithelium with numerous layers of cells.
a fine thread-like structure. In plants: the stalk of the male sexual organ.