The coronary sinus opens into （）.

单项选择题The fossa ovalis is （）.

A．a foramen between the right atrium and the left one
B． existent during the fetus
C．located on the lower part of the right surface of the interatrial septum
D．the thickest part of the wall of the heart
E．a remnant of the fetal heart between the atrium and ventricle

单项选择题The narrowest part of the laryngeal cavity is （）.

A．the aperture of larynx
B．the rima vestibuli
C．the intermedial cavity of larynx
D．the fissure of glottis
E．the infraglottic cavity

单项选择题The maxillary sinuses open into （）.

A．the nasal vestibule
B．the sphenoethmoidal recess
C．the superior nasal meatus
D．the middle nasal meatus
E．the inferior nasal meatus

单项选择题Which nerve injured can lead to “claw hand”(爪形手) （）.

A．musculocutaneous nerve
B．median nerve
C．ulnar nerve
D．axillary nerve
E．radial nerve

单项选择题The apex of axilla is bounded by （）.

A．lateral 1/3 of clavicle
B．medial border of scapula
C．lateral border of first rib
D．head of humerus
E． pectoralis major

单项选择题Concerning the musculocutaneous nerve, which one is true ？（）

A．it arises from medial cord of brachial plexus
B．it innervates triceps brachii
C．it supplies posterior group of muscles of arm
D．it innervates the coracobrachialis
E．it acompanies with deep brachial vessels

单项选择题Which nerve passes through the quadrilateral foramen （）.

A．musculocutanous nerve
B．median nerve
C．ulnar nerve
D．radial nerve
E．axillary nerve

单项选择题Regarding the femoral triangle （）.

A．the femoral vein, artery, and nerve lie in the femoral sheath.
B．the femoral nerve lies most medially in the femoral triangle.
C．the lateral border of the femoral triangle is formed by the lateral border of sartorius muscle
D．the femoral canal lies medial to the femoral vein.
E．at the apex of the femoral triangle, the femoral vessels pass into the popliteal fossa.

单项选择题The anterior tibial artery （）.

A．is a branch of the femoral a.
B．begins at level of the lower border of the popliteus
C．passes through the adduct canal.
D．accompanies the tibial nerve.
E．is palpable in the foot.

单项选择题The only innervation of the femoral nerve below the level of the knee is （）.

A．the gracilis muscle
B．the tibialis anterior muscle
C．the adductor longus
D．the skin on the medial side of leg and foot
E．the skin of the lateral side of leg and foot