Write out the components of the conduction system of heart.

多项选择题the narrows of the male urethra are: （）.

A． at the internal urethral orifice
B．at the external orifice of urethra
C．at the membranous part
D．at prostatic part
E．at bulb of urethra

多项选择题he contents of carotid triangle include （）.

A．common carotid a. and its branches
B．internal jugular v. and its tributaries
C．hypoglossal n.
D．vagus nerve
E．accessory nerve

多项选择题The structures can be seen in coronal section of kidney are （）.

A．renal column
B．renal pyramid
C．renal cortex
D．minor renal calices
E．major renal calices

多项选择题Upper digestive tract consists of （）.

A．duodenum
B．esophagus
C．oral cavity
D．pharynx
E．stomach

多项选择题Inguinal canal：（）.

A．the anterior wall is aponeurosis of obliquus externus abdominis
B．the inferior wall is inguinal ligament
C．the posterior wall is transverse fascia only
D．the superior wall is obliquus internus abdominis and transversus abdominis
E．in female, the round lig. of uterus pass through it

多项选择题Anterior to the root of the right lung are （）.

A．right phrenic n.
B．superior vena cava
C．ascending aortic a.
D．right vagus n.
E．right pericardiacophrenic vessels

多项选择题The structures passing through the lacuna vasorum are （）.

A．femoral sheath
B．femoral nerve
C．lymphatic vessels
D．pectineus
E．femoral artery and vein

多项选择题The structures perforating the diaphragm are （）.

A．inferior vena cava
B．aortic a.
C．esophagus
D．vagus n.
E．thoracic duct

多项选择题The cephalic vein （）.

A．arises from the lateral side of dorsal venous rete of hand
B．runs along the lateral side of the biceps brachi
C．accompany the radial artery
D．receives the superficial veins of the hand and the medial side of the forearm
E．drain into the axillary vein

多项选择题The structures passing through the malleolar canal are （）.

A．tibialis posterior
B．extensor hallucis longus
C．posterior tibial artery
D．tibial nerve
E．flexor digitirum longus