Fundus

The part of a hollow organ that is across from, or farthest away from, the organ’s opening. Depending on the organ, the fundus may be at the top or bottom of the organ. For example, the fundus of the uterus is the top part of the uterus that is across from the cervix (the opening of the uterus). The fundus of the bladder is the back, bottom part of the bladder. Certain organs, including the bladder, gallbladder, stomach, uterus, and eye, have a fundus.

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