From Ben Coffer Sent Wed, Aug 5th 1998, 20:41
From Ben Coffer Sent Wed, Aug 5th 1998, 20:41
One of my friends sent me this. Scary eh? ------- Forwarded message follows ------- Be very frightened ... > > List of Three's > > The structure of the human body is organized into groups of three with > remarkable frequency. I have listed several examples of this tendency > by region. This list does not include structures contributing to form > the many "triangles" in the body. If you know of any more, please let > me know (xxxxxxxx@xxx.xxxxxxx.xxx.xxx) > ______________________________________________________________________ > > Loyola University Medical Education Network > ______________________________________________________________________ > > Embryology > > > 3 germ layers- endoderm > mesoderm > ectoderm > > 3 divisions of somites- sclerotome > dermatome > myotome > > 3 definitive kidneys- pronephros > mesonephros > metanephros > > Back > > > 3 parts of the erector spinae m.- iliocostalis > longissimus > spinalis > each are divided again into 3 parts > > 3 parts of the transversospinalis m. - semispinalis m. > multifidus m. > rotator m. > > 3 coverings of the spinal cord- dura mater > arachnoid > pia > > > Neck > > > 3 parts of the axillary artery > 3rd part has 3 branches- subscapular > anterior humeral circumflex > posterior humeral circumflex > > Brachial plexus > 3 trunks- upper > middle > lower > 3 posterior divisions > 3 anterior divisions > 3 cords- lateral > medial > 3 branches off medial cord- medial >brachial > medial >antebrachial > medial >pectoral > posterior > 3 branches off posterior cord- upper su >bscapular > lower s >ubscapular > thoraco >dorsal > > 3 branches off the thyrocervical trunk- transverse cervical > suprascapular > inferior thyroid > 3 veins drain the thyroid gland - superior (into internal jugular >) > middle (into internal jugular) > inferior (into left brachioceph >alic) > 3 scalene muscles- anterior > middle > posterior > 3 constrictor muscles- superior > middle > inferior > 3 parts of the pharynx- nasopharynx > oropharynx > laryngeopharynx > 3 parts to the hyoid bone- body > greater horn > lesser horn > > Head > > > 3 parts of the maxillary artery- mandibular > pterygoid > pterygopalatine > 3 divisions of the trigeminal n.- V1 - ophthalmic > V2 - maxillary > V3 - mandibular- has 3 parts > undivided trunk > anterior division > posterior division- ha >s 3 branches > auriculotempora >l > lingual > inferior alveol >ar > 3 cranial fossae- anterior > middle > posterior > > 3 cranial nerves pass through jugular foramen- C.N. IX > C.N. X > C.N. XI > 3 cranial nerves travel in the wall of the cavernous sinus- C.N. II >I > C.N. IV > C.N. V > 3 cranial nerves carry parasympathetics to the head- C.N. III > C.N. VII > C.N. IX > 3 paired paranasal sinuses- maxillary > frontal > ethmoidal > (sphenoid sinus is not paired) > 3 muscles innervated by 3 cranial nerves attach to the styloid process- > stylohyoid - C.N. VII > stylopharyngeus - C.N. IX > styloglossus - C.N. XII > 3 layers in tympanic membrane (derived from 3 germ layers) > 3 middle ear bones- incus > malleus > stapes > 3 semicircular canals > 3 intrinsic muscles of the tongue- longitudinal > vertical > transverse > > > Shoulder > > > 3 muscles attach to coracoid process - coracobrachialis > pectoralis minor > short head of biceps > 3 parts of the axillary a.; 3rd part has 3 branches- subscapular a. > anterior circum >flex humeral a. > posterior circu >mflex humeral a > > > Arm > > > 3 muscles in anterior comparment- biceps brachii > coracobrachialis > brachialis > 3 heads of triceps brachii m.- long > lateral > medial > > > > Forearm > > > 3 muscles in deep anterior compartment - flexor digitorum profun >dus > flexor pollicis longs > pronator quadratus > > > Hand > > > 3 muscles in thenar eminence- opponens pollicis > flexor pollicis brevis > abductor pollicis brevis > 3 muscles in hypothenar compartment- flexor digiti minimi > abductor digiti minimi > opponens digiti minimi > 3 phalanges in fingers- proximal > middle > distal > 3 palmer interossei > > > Thorax > > > 3 compartments- mediastinum > left pleural cavity > right pleural cavity > 3 branches off the aortic arch- brachiocephalic a. > left common carotid a. > left subclavian a. > 3 principal surfaces of the pleura- costal > diaphragmatic > mediastinal > *the cupola is the supe >rior extension > 3 lobes of the right lung- superior > middle > inferior > 3 bronchopulmonary segments of the upper right lobe- apical > posteri >or > anterio >r > 3 false ribs on each side > 3 cusps of the semilunar aortic and pulmonary valves of the heart > 3 cusps of the tricuspid valve > 3 main arteries of the heart- circumflex > anterior interventricular > right coronary > 3 splanchnic nerves- greater > lesser > least > > > > Abdomen > > > 3 folds in anterior abdominal wall- median (obliterated urachus) > medial (obliterated umbilical a >.) > lateral (inferior epigastric a. >) > 3 openings in diaphragm- aortic > esophageal > inferior vena cava > 3 arcuate ligaments of diaphragm- median over aorta > medial over psoas major m. > lateral over quadratus lumborum > m. > 3 parts of the stomach- fundus > body > pylorus > 3 unpaired branches of the abdominal aorta- celiac a. > superior mesenteric a. > inferior mesenteric a. > 3 brances of celiac a.- left gastric a. > splenic a. > common hepatic a. > 3 brancheds of common hepatic a.- right gastric a >. > proper hepatic >a. > gastroduodenal >a. > > 3 arterial branches supply adrenal glands- inferior phrenic > aorta > renal > 3 structures lie within porta hepatis- proper hepatic a. > portal vein > common bile duct > 3 principal veins contribute to the portal vein- splenic v. > superior mesent >eric v. > inferior mesent >eric v. > 3 parts of the small intestine- duodenum > jejunum > ileum > 3 parts of large intestine- ascending > transverse > descending > 3 coverings of the spermatic cord- external spermatic fascia > cremasteric fascia > internal spermatic fascia > > > > > Pelvis and Perineum > > > 3 bones in os coxae- pubis > ilium > ischium > 3 parts of the pubis- body > superior ramus > inferior ramus > 3 foramina in the pelvis- obturator foramen > greater ischiadic foramen > lesser ischiadic foramen > 3 gluteus muscles- gluteus maximus > gluteus medius > gluteus minimus > 3 rectal arteries- superior rectal from inferior mesenteric a. > middle rectal from internal iliac a. > inferior rectal from internal pudendal a. > 3 branches of the posterior division of internal iliac a.- iliolum >bar > lateral > sacral > superio >r gluteal > 3 parts of the urethra- prostatic > membranous > spongy > 3 parts of the uterus- fundus > body > cervix > 3 erectile compartments of the penis- corpus spongiosum > left corpus cavernosum > right corpus cavernosum > 3 muscles in superficial perineal pouch- bulbospongiosus > ischiocavernosus > superficial transverse >perineus > 3 arteries supply the rectum- superior rectal (from inferior mesenter >ic) > middle rectal (from internal iliac) > inferior rectal (from internal pudendal >) > > > Gluteus > > > 3 gluteal muscles- gluteus maximus > gluteus medius > gluteus minimus > 3 muscles innervated by superior gluteal n.- gluteus medius > gluteus minimus > tensor fascia lata > > > > Thigh > > > 3 hamstring muscles- biceps femoris > semitendinosus > semimembranosus > 3 compartments in the femoral sheath > 3 muscular compartments of the thigh- anterior > medial > posterior > 3 branches of the lateral femoral circumflex a.- descending bran >ch > transverse bran >ch > ascending branc >h > > > Leg > > > 3 muscles in anterior compartment - tibialis anterior > extensor digitorum > extensor hallucis > > Foot > > > 3 cuneiform bones- medial > intermediate > lateral > 3 phalanges in toes- proximal > middle > distal > 3 plantar interossei > > > Miscellaneous > > > 3 exams in the course > ______________________________________________________________________ -- Ben Coffer http://www.hybridgame.demon.co.uk/