List of Three's in Anatomy |
General
3 body planes - frontal sagittal transverse 3 layers of skin- epidermis dermis hypodermis 3 general venous circulations- systemic pulmonary portalEmbryology
3 germ layers- endoderm mesoderm ectoderm 3 divisions of somites- sclerotome dermatome myotome 3 definitive kidneys- pronephros mesonephros metanephros 3 derivatives of skull- desmo/dermatocranium splanchno/viscerocranium chondrocranium 3 initial embryonic divisions of the brain- prosencephalon mesencephalon rhombencephalonBack
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 3 spaces surrounding spinal cord- epidural subdural subarachnoid 3 borders of the scapula- medial (vertebral) lateral superior 3 angles of the scapulaNeck
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 subscapular lower subscapular thoracodorsal 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 brachiocephalic) 3 scalene muscles- anterior middle posterior 3 muscles attach to spine of C2- semispinalis cervicis obliquus capitis inferior rectus capitis posterior major 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 3 structures inside carotid sheath- common carotid artery internal jugular vein vagus nerve 3 ganglia in sympathetic cervical chain- superior (magnum) middle inferior (stellate)Head
3 parts of the maxillary artery- mandibular pterygoid pterygopalatine 3 divisions of the trigeminal n.- V1 - ophthalmic - has 3 branches frontal nasociliary lacrimal V2 - maxillary V3 - mandibular- has 3 parts undivided trunk anterior division posterior division- has 3 branches auriculotemporal lingual inferior alveolar 3 cranial fossae- anterior middle posterior 3 nuchal lines- inferior superior highest 3 layers to calvarium- outer table diploe inner table 3 clinoid processes of the sphenoid bone- 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. III C.N. IV C.N. V 3 cranial nerves carry parasympathetics to the head- C.N. III C.N. VII C.N. IX 3 nasal conchae- superior middle inferior 3 principal components of the temporal bone- squama petro/mastoid tympanic ring 3 bones of the upper jaw/palate- premaxilla maxilla palatine 3 salivary glands- parotid submaxillary sublingual 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 cranial nerves innervate the external tympanum- C.N. V C.N. VII C.N. X 3 middle ear bones- incus malleus stapes 3 parts of the ear- outer middle inner 3 semicircular canals 3 membranes of the cochlea- Reissner Tectorial Basilar 3 intrinsic muscles of the tongue- longitudinal vertical transverse 3 muscles elevate the mandible- masseter m. temporalis m. medial pterygoid m. 3 branches of the posterior auricular artery- stylomastoid branch auricular branch occipital branch 3 branches of the ophthalmic nerve (VI)- nasociliary n. frontal n. lacrimal n. 3 superior alveolar nerves- anterior superior alveolar n. middle superior alveolar n. posterior superior alveolar n. 3 types of deciduous teeth- incisors canine molars 3 layers of dentition- enamal dentin pulp 3 general layers of the eye - retinal choroidal/ciliary body scleral/corneal 3 color receptors in cone cells - red blue yellow 3 nerves to the larynx - external laryngeal n. internal laryngeal n. recurrent laryngeal n. 3 cerebral arteries - anterior middle posterior 3 arteries supply the cerebellum - superior cerebellar anterior inferior cerebellar posterior inferior cerebellarShoulder
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 circumflex humeral a. posterior circumflex humeral a 3 muscles of the rotator cuff are rotators 3 glenohumeral ligaments - superior middle inferiorArm
3 muscles in anterior comparment- biceps brachii coracobrachialis brachialis 3 heads of triceps brachii m.- long lateral medial 3 muscles attach to greater tubercle of the humerus- supraspinatus infraspinatus teres minor 3 parts of the ulnar collateral ligament of the elbow - anterior posterior obliqueForearm
3 muscles in deep anterior compartment - flexor digitorum profundus flexor pollicis longs pronator quadratusHand
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 interosseiThorax
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 parts of the aorta- ascending arch descending 3 principal surfaces of the pleura- costal diaphragmatic mediastinal *the cupola is the superior extension 3 lobes of the right lung- superior middle inferior 3 bronchopulmonary segments of the upper right lobe- apical posterior anterior 3 muscles of interthoracic wall- external intercostal internal intercostal intercostalis intimus 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 leastAbdomen
3 folds in anterior abdominal wall- median (obliterated urachus) medial (obliterated umbilical a.) lateral (inferior epigastric a.) 3 muscles contribute to linea semilunaris/rectus abdominus aponeurosis - internal oblique external oblique transversus abdominus 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 smooth muscle layers of the stomach- oblique longitudinal circular 3 unpaired branches of the abdominal aorta- celiac a. superior mesenteric a. inferior mesenteric a. 3 branches of celiac a.- left gastric a. splenic a. common hepatic a. 3 branches 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 mesenteric v. inferior mesenteric v. 3 parts of the small intestine- duodenum jejunum ileum 3 parts of large intestine- ascending transverse descending 3 tenia of large intestine 3 coverings of the spermatic cord- external spermatic fascia cremasteric fascia internal spermatic fascia 3 vessels in the umbilical cord umbilical vein 2 umbilical arteriesPelvis 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.- iliolumbar lateral sacral superior gluteal 3 openings in the urinary bladder- left ureter right ureter urethra 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 mesenteric) middle rectal (from internal iliac) inferior rectal (from internal pudendal) 3 valves in the rectum- superior middle inferiorGluteus
3 gluteal muscles- gluteus maximus gluteus medius gluteus minimus 3 muscles innervated by superior gluteal n.- gluteus medius gluteus minimus tensor fascia lataThigh
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 branch transverse branch ascending branch 3 muscles contribute to the pes anserinus- sartorius semitendinosus gracilisLeg
3 compartments in the leg 3 muscles in anterior compartment - tibialis anterior extensor digitorum extensor hallucis 3 branches of the peroneal artery in the leg - anterior tibial a. posterior tibial a. peroneal a. 3 peroneal muscles in the leg - peroneus longus m. peroneus brevis m. peroneus tertius m. 3 muscles that comprise the triceps surae - grastrocnemius m. soleus m. plantaris m. 3 muscles in the deep posterior compartment - tibialis posterioris m. flexor hallucis longus m. flexor digitorum longus m.Foot
3 cuneiform bones- medial intermediate lateral 3 phalanges in toes- proximal middle distal 3 plantar interossei 3 described arches - medial lateral transverseMiscellaneous
3 exams in the course
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Please contact: John A. McNulty, Ph.D. | Last Updated: Feb 21, 2006 Created: May 1, 1994 |