15B. The Urogenital Region (triangle) 1. Superficial fascia of perineum (Colles)(会阴浅筋膜)
16The Urogenital Region (会阴浅横肌) 2. Superficial perineal space (会阴浅间隙) 1) superficial transverse muscle of perineum(会阴浅横肌)2) bulbocavernous muscle (球海绵体肌)3) ischiocavernous muscle (坐骨海绵体肌）
17The Urogenital Region 4) urogenital diaphragm (尿生殖膈) a. inferior fascia of urogenital diaphragm(尿生殖膈下筋膜)b. superior fascia of urogenital diaphragm(尿生殖膈上筋膜)
18The Urogenital Region c. deep perineal space (会阴深间隙) i. deep transverse muscle of perineum(会阴深横肌)ii. sphincter of urethra M: (尿道括约肌)urethrovaginal sphincterF: (尿道阴道括约肌)
19Section 3 The perineumpelvic diaphragmUrogenital diaphragm
20Accessory gland The greater vestibular (Bartholin’s) glands Section 3 The perineumAccessory glandThe greater vestibular (Bartholin’s) glandsOn either side of vaginal orificeOpen into vestibule at orifice of vagina
21II. The external reproductive organs Mons pubisGreater lips of pudendumLesser lips of pudendumVaginal vestibuleClitorisBulb of vestibule
24The External Genital Organs (外生殖器) A. THE SCROTUM(阴囊)B. THE PENIS (阴茎)
25The external reproductive organs Ⅰ) The scrotumPouch of thin skin lying below the root of the penisDivided into two haves by septum of scrotum, contains testes and their ductsDeep to skin is dartos coat , a connective tissue layer that contains many smooth muscle fibers which contracts in response to cold, pulling the testes closer to the body and wrinkling the skin
26The Scrotum (阴囊) cavity of tunica vaginalis (鞘膜腔) [hydrocele of tunica vaginalis 鞘膜积液][varicocele精索静脉曲张]
27Parietal peritoneumTransvers fasciaObliquus internusabdominisTrasversus abdominisAponeurosis of obliquus externus abdominisExternal spermatic fasciaCremastterInternal spermatic fasciaTunica vaginalis of testis
28Consists of the root, body and glans penis Contains Ⅱ) The penisConsists of the root, body and glans penisContainsTwo cavernous body of penisA cavernous body of urethra Skin－thin and loosePrepuce of penisFrenulum of prepuce
29The male urethra Three parts Prostatic part Lies within the prostate and is the widest and most dilatable portion of urethra.Membranous partLies within the urogenital diaphragm surround by the sphincter of urethra.Cavernous part Transverse the length of cavernous body of urethra.
30The Penis (阴茎) 2. Compositions (组成) 1) cavernous body of penis (阴茎海绵体) crus of penis (阴茎脚)2) cavernous body of urethra(尿道海绵体)glans f penis( 阴茎头)bulb of urethra(尿道球)
41Structures passing suprapiriform foramen Superior gluteal n., a., v. from lateral to medial sideStructures passing infrapiriform foramenSciatic n., posterior femoral cutaneous n., inferior gluteal n., a.,v., internal pudendal v., a., and pudendal n. from lateral to medial side
43Pudendal nerve, internal pudendal artery These structures enter the gluteal region through the infrapiriform foramen.They then curve forwards to enter the perineum through the lesser sciatic foramen.
44★Sciatic nerveCourse: It arises from the sacral plexus and passes through infrapiriform foramen into the gluteal region, deep to gluteus maximus, passing midway between the greater trochanter of femur and ischial tuberosity to back of thigh, the nerve lies deep to the long head of biceps on the posterior surface of adductor magnus. The sciatic nerve usually ends half-way down the back of the thigh by dividing into the common peroneal and tibial nerves.Distribution: semitendinosus, semimembranosus and biceps femoris and has articular branches to hip and knee joints
46Boundaries of the popliteal fossa Diamond-shapedUpper lateral boundary: Biceps femorisUpper medial boundary:semimembranosus and semitendinosusTwo lower boundaries are the heads of gastrocnemiusPosterior wall: deep fasciaAnterior wall: popliteal surface of the femur, the posterior capsule of the knee joint, and the fascia covering poplitells
47Contents of the popliteal fossa Tibial and common peroneal nerves and their branchesPopliteal vein and its tributariesPopliteal artery and its branchesPopliteal lympn nodesFatty tissue
48Popliteal arteryIt begins at the adductor tendinous opening in. Here it is continuous with the femoral artery. It ends at the lower border of the popliteus muscle where it divides into anterior and posterior tibial arteries.Branches:1. Superior, inferior, and middle genicular arteries2. Muscular branches
49Popliteal veinThis is formed by the junction of the anterior and posterior tibial veins near the lower border of the popliteus muscle.Popliteal lymph nodesThere may be one or two nodes just under the deep fascia, close to the popliteal fossa vessels.They drain the deep tissues of the leg and foot and the knee joint. They also receive superficial lymph vessels from the lateral side of the foot, the heel, and the back of the calf. These drain along the line of the small saphenous vein.
50The back of the leg Find the small saphenous vein Find the Sural nerve and Peroneal communicating nerve