ulna has a distal head?
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Ulna. The ulna is a long thin bone with a small distal head that bears the styloid process, and an expanded proximal end. The proximal end terminates in the olecranon process and bears the semilunar notch on its upper surface. In man, the head of the ulna does not articulate with any of the bones of the carpus.
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['Phalanges.', 'Humerus.', 'Carpals.', 'Ulna.', 'Metacarpals.']
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Your hand is further away from your torso than your elbow, therefore your hand is “distal” when compared to your elbow. ... The wrist is closer to the torso than the fingers, therefore it is “proximal” when compared to your fingers.
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Your elbow is closer to your torso than your hand, therefore your elbow is “proximal” when compared to your hand. ... Your elbow is further away from your torso than your shoulder, therefore your elbow is “distal” when compared to your shoulder.
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Despite having many adjacent structures, the radius and ulna are directly connected via a syndesmosis called the radioulnar fibrous joint. It is an interosseous membrane that runs between the medial aspects of the bones and sections off the region of the forearm into anterior and posterior compartments.
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Up to the age of 50 the relative length of the both forearm bones is the same. Then the ulna surpasses the length of the radius a little. The maximum difference amounts to 1 mm.
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Structure and function. The olecranon is a strong process of the proximal and posterior ulna that, together with the coronoid process, forms the trochlear notch. This notch holds the trochlea of the distal humerus forming the ulnohumeral articulation, the hinge joint of the elbow.
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The ossicles are held in place by fine ligaments and are named according to their shapes. The malleus. This is the lateral hammer-shaped bone. The handle is in contact with the tympanic membrane and the head forms a movable joint with the incus.
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['Distal – The surface that is away from the midline of the face.', 'Facial – The surface that faces the cheeks or lips. ... ', 'Incisal – The biting edge of an anterior tooth.', 'Lingual – The surface that faces the tongue.', 'Mesial – The surface that is closest to the midline of the face.']
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The lateral head originates from the back surface of the humerus, just above the radial groove. The long head originates from the infraglenoid tubercle of the scapula.
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The triceps brachii (better known as the triceps) has three heads—lateral, medial, long. All three heads of the triceps are connected to the humerus and scapula bones. The muscle then travels down the arm and is connected on to the ulna of the forearm.
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Elbow. The ulna articulates with the humerus at its most proximal point forming the elbow in a hinge joint. It is the trochlea of the humerus which sits in the semi-lunar notch of the ulna to form this joint.
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The palm includes five metacarpals, and each finger except the thumb contains one proximal phalanx, one middle phalanx, and one distal phalanx. The thumb doesn't have a middle phalanx. Each bone is connected by a series of ligaments. Each fingertip—distal phalanx and accompanying tissue—contains a fingernail.
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The axial skeleton includes the skull and all the cranial bones, the spine, the ribs and the hyoid bone. ... The pelvis, femur, fibula, tibia and all of the foot bones as well as the scapula, clavicle, humerus, radius, ulna and all of the hand bones are classified as appendicular.
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The head of the humerus is almost hemispherical, while that of the femur forms about two-thirds of a sphere. ... The anatomical neck of the humerus is only a slight constriction, while the neck of the femur is a very distinct portion, running from the head to meet the shaft at an angle of about 125°.
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The elbow is a hinged joint made up of three bones, the humerus, ulna, and radius. The ends of the bones are covered with cartilage. Cartilage has a rubbery consistency that allows the joints to slide easily against one another and absorb shock. The bones are held together with ligaments that form the joint capsule.
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The cuneiform (from the Latin for 'wedge') bones are a set of three bones in the medial side of the foot that articulate with the navicular proximally and with the proximal surfaces of metatarsal 1-3 distally.