(1) According to different circulation routes, blood circulation can be divided into systemic circulation and pulmonary circulation. Among them, the main pathways of systemic circulation are: A left ventricle → aorta →H artery → capillaries in M tissue →N vein → superior and inferior vena cava →C right atrium. The main path of pulmonary circulation is: B right ventricle →E pulmonary artery →F pulmonary capillary →G pulmonary vein →D left atrium.
(2) The heart is the dynamic organ of blood circulation; The contraction of the left ventricle transports blood to the whole body for a long distance, so the wall of the left ventricle is the thickest. Therefore, the power of blood circulation comes from the heart. It is divided into four ventricles, among which: D The left ventricle has the thickest muscle and the strongest contraction.
(3) As can be seen from the blood circulation pattern diagram, Xiao Wang's right finger was injured and inflamed during the activity, and the doctor injected penicillin into his hip. Penicillin enters the blood through the hip capillary, and passes through systemic vein → inferior vena cava → right atrium → right ventricle → pulmonary artery → pulmonary vein → left atrium → left ventricle → aorta → right upper limb artery → finger capillary (injury).
So the answer is:
( 1)A→H→M→N→C； B→E→F→G→D
(2) heart; D left ventricle;
(3) Hip capillary → systemic vein → inferior vena cava → right atrium → right ventricle → pulmonary artery → pulmonary vein → left atrium → left ventricle → aorta → right upper limb artery → finger capillary (wound).