Our editors will review what you_ve submitted and determine whether to revise the article. WebMD - What Fallopian Tube procedures help with fertility? Each fallopian tube is 10-13 cm (4-5 inches) long and 0.5-1.2 cm (0.2-0.6 inch) in diameter. The channel of the tube is lined with a layer of mucous membrane that has many folds and papillae-small cone-shaped projections of tissue. Over the mucous membrane are three layers of muscle tissue; the innermost layer has spirally arranged fibres, the middle layer has circular fibres, and the outermost sheath has longitudinal fibres that end in many fingerlike branches (fimbriae) near the ovaries, forming a funnel-shaped depository called the infundibulum. The infundibulum catches and channels the released eggs; it is the wide distal (outermost) portion of each fallopian tube. The endings of the fimbriae extend over the ovary; they contract close to the ovary_s surface during ovulation in order to guide the free egg. Leading from the infundibulum is the long central portion of the fallopian tube called the ampulla.

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