Transport- heart structure

A    External view (ventral)
B    Section
C    Simplified section showing blood flow
D,E    Direction of blood flow
E    Oxygen-poor blood
1    In nominate artery
2    Right pulmonary artery
3    Aortic arch
4    Superior vena cava
5    Right pulmonary vein
6    Right atrium
7    Right coronary artery
8    Right ventricle
9    Posterior vena cava
10    Left common carotid artery
11    Left subclavian artery
12    Left pulmonary artery
13    Left pulmonary veins
14    Left atrium
15    Left coronary artery
16    Left-p ventricle

17    Aorta
18    Pulmonary valve
19    Tricuspid valve
20    Valve tendon
21    Mistral (bicuspid) valve
22    Aortic valve
23    Intreventricular septum