The grape consists of three primary elements, the skin, the pulp, and the seeds. The skin is actually several layers of material: the bloom, a wax and cutin layer that prevents dehydration of the berry and the epidermis, which contains the pigments and tannins so important to wine color, structure, and flavor. The pulp is a grouping of about 40 veined cells that are connected in a vascular network to a central structure known as the brush, which connects the inner part of the grape to the little bit of stem known as the pedicel which in turn connects the berry to the cluster. The seeds (most often one or two), are connected to the same vascular network as the pulp, and vary in size and shape depending on the variety of the vine. — The Oxford Companion to Wine
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