U
- Ulnar arteryArtery of the forearm
- Ulnar collateral ligament of elbow jointThe ulnar collateral ligament (UCL) or internal lateral ligament is a thick triangular lig
- Ulnar nerveNerve which runs near the ulna bone
- Ultrafiltration (kidney)Filtration by a semi-permeable membrane
- Uncinate fasciculusWhite matter tract in the human brain
- UnconsciousnessLoss of awareness of self and environment
- Up from DragonsBook by John Skoyles and Dorion Sagan
- Upper limbConsists of the arm, forearm, and hand
- Urinary meatusOrifice of the urethra
- Urine anion gapIn clinical chemistry, the urine anion gap is calculated using measured ions found in the
- Urine collection deviceDevice used to collect urine in aircraft and spacecraft
- Urine sodiumUrine sodium is a measurement of the concentration of sodium in the urine.
- Urogenital diaphragmOlder texts have asserted the existence of a urogenital diaphragm, also called the triangu
- Utricle (ear)Membranous labyrinth in the vestibule of ear