Any of the small, slender, vascular projections that increase the surface area of a membrane. Important villous membranes include the placenta and the mucous-membrane coating of the small intestine. Each villus has a central core composed of one artery and one vein, a strand of muscle, a centrally located lymphatic capillary, and connective tissue that adds support to the structures. Covering the core of a villus is the surface mucous-membrane layer. This is mainly composed of two cell types: tall, narrow, columnar cells and goblet cells. (BRENDA Tissue and Enzyme Source Ontology, BTO_0003121)
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14 genes co-occuring with the biological term villus in literature-supported statements describing functions of genes from the GeneRIF Biological Term Annotations dataset.