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an organelle that occurs in the cytoplasm of both plant and animal cells. It is made from stacks of membrane-bound structures known as cisternae. An individual stack can be referred to as a dictyosome, especially in plant cells. It is particularly important in the processing of proteins for secretion.
the cartilaginous flap at the top of the mammalian trachea, which closes off the entrance to the...
the branch of the renal artery which carries blood to the nephron, and branches to form the...
a chemical messenger produced and released by a cell or a gland in one part of the body of the...
a tough substance made from a modified polysaccharide that contains nitrogen. It is the main...
a relationship between two different organisms, of different species, from which at least one of...