D.膈淋巴结

E.胸骨旁淋巴结

42.其输出管形成腰干的淋巴结是（ ）

A.腹腔淋巴结

B.肠系膜上淋巴结

C.肠系膜下淋巴结

D腰淋巴结

E.髂总淋巴结

43.手拇指感染,细菌首先到达（A.肘淋巴结

B.腋窝淋巴结

C.锁骨下淋巴结

D.胸骨旁淋巴结

E.膈淋巴结

44.,细菌首先到达（A.腘淋巴结

B.腹股沟浅淋巴结

C.腹股沟深淋巴结

）

）

D.髂外淋巴结

E.腰淋巴结

45.鼻部感染,细菌可通过何处进入海绵窦?（ ）

A.眼上、下静脉

B.椎静脉

C.颈内静脉

D.颈外静脉

E.颞浅静脉

46. The base of the heart faces（ ）

A. anteriorly and to the right

B. superiorly

C. posteriorly and to the right

D. inferiorly

E. in none of the above directions

47. The fossa ovalis is in （ ）

A. the posterior wall of the left atrium

B. the left ventricle on the interventricular septum

C. the right ventricle on the interventricular septum

D. the right side of the interatrial septum

E. the anterior wall of the right atrium

48. The right and left ventricles show differences in all of the following, except（ ）

A. the thickness of their walls

B. their relationships to the ribs

C. the number of their respective atrioventricular valves D. the arrangement and nuof their papillary muscles

E. their volume outputs

49. The interventricular septum（ ）

A. lies in a sagittal plane

B. is muscular throughout

C. contains the atrioventricular node

D. is convex anteriorly and to the right

E. has a septal cusp of the pulmonary valve attached to it

50. Veins draining the heart empty（ ）

A. directly into the right atrium alone

B. directly into both the right and left atria

C. via the anterior cardiac vein into the left atrium

D. into the coronary sinus and directly into the chambers of the heart

E. into the coronary sinus alone

51. The sinuatrial node is situated（ ）

A. on the right of the opening of the inferior vena cava

D. on the right of the opening of coronary sinus

C. within the interatrial septum

D. at the opening of the coronary sinus

E. in front of the opening of the superior vena cava

52. With regard to the heart, which of the following statements true?（ ）

A. The base of the heart rests on the diaphragm

B. The left border is sharp and almost horizontal

C. The visceral layer of the serous pericardium is actually the epicardium

D. The pericardial cavity, a slit-like space between the parietal layer and visceral layer of the serous pericardium, is actually one portion of the pleural cavities, because both serous pericardium and pleurae are serous membranes and are continuous with one another

E. The myocardium is composed of cardiac muscle cells and smooth muscle cells because the beating of the bean is generally not under control of will