livmoder uterus organ cavity cavity of uterus http://purl.org/sig/ont/fma/fma17745 https://en.wikipedia.org/wiki/Uterine_cavity A09.1.03.007 The inside of the uterus. It is triangular in shape, the base (broadest part) being formed by the internal surface of the fundus between the orifices of the uterine tubes, the apex by the internal orifice of the uterus through which the cavity of the body communicates with the canal of the cervix. The uterine cavity of the body of the uterus is a mere slit, flattened antero-posteriorly. uterine cavity