enzyme, ferment
scar, scarring
ulna (middle lower arm bone)
umbilicus (navel)
nail
urine; urinary tract
palate
ureter
urethra
urine condition
urine
uterus (womb)
uvea, vascular layer of eye (iris, choroid, ciliary body)
uvula
vaccine
vagus nerve
valve
varicose veins
vessel; duct; vas deferens