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ALPHABETICAL INDEX
A B C D E F G H I J K L M N O P Q R S T U V W X Y Z

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TERMS AND DEFINITIONS
LINKS TO THE VIRTUAL HUMAN BODY
ulna
Long paired bone forming, with the radius, the skeleton of the forearm and articulating with the humerus and radius at the elbow.

ulnar artery
Terminal branch of the brachial artery, irrigating mainly the medial and posterior parts of the forearm.

ulnar extensor muscle of wrist
Muscle connecting the posterior faces of the humerus and ulna to the base of the fifth metacarpal; it allows the hand to fold backward (extension) and to move toward the axis of the body (adduction).

ulnar flexor muscle of wrist
Muscle having two heads connecting the medial epicondyle of the humerus and the ulna to the pisiform bone; it allows the hand to flex and move toward the axis of the body (adduction).

ulnar nerve
Nerve arising from the brachial plexus, especially innervating the flexor muscles of the hand and fingers.

ulnar recurrent artery
Branch of the ulnar artery, irrigating the elbow region inside; it follows an upward course.

ulnar veins
Veins of the posterior part of the forearm, joining the radial veins at the elbow to form the brachial veins.

umbilicus
Scar in the form of a rounded depression resulting from the cutting of the umbilical cord.

upper canine
Canine of the upper dental arch, located between the lateral incisor and first premolar.

upper central incisor
Incisor located in the front section of the upper dental arch.

upper first molar
Molar of the upper dental arch, located between the second premolar and second molar.

upper fisrt premolar
Premolar of the upper dental arch, located between the canine and second premolar.

upper lateral incisor
Incisor of the upper dental arch, located between the central incisor and canine.

upper limb
Appendage formed by the arm, forearm and hand, connected to the trunk at the shoulder; it is used mainly for gripping.

upper lip
Lip forming the upper contour of the mouth.

upper second molar
Molar of the upper dental arch, located between the first molar and wisdom tooth.

upper second premolar
Premolar of the upper dental arch, located between the first premolar and first molar.

upper third molar
Last molar of the upper dental arch.

ureter
Each of two smooth muscular membranous channels carrying urine from the kidneys to the bladder.

ureteric orifice
Orifice through which a ureter connects with the bladder.

urinary bladder
Hollow organ in which the urine produced in the kidneys temporarily collects; it empties through the ureter during urination.

uterine cavity
Hollow space contained inside the walls of the uterus.

uterine tube
Each of two tubes culminating in the upper part of the uterus and having fimbriae that sweep the ovaries and collect ova.

uterus
Hollow female genital organ located between the bladder and rectum, in which the fetus develops during pregnancy.

uvula of urinary bladder
Small protrusion inside the bladder, near the internal ureteric orifice; it is visible mainly in adult men.