1. Transport in animals Mass flow transport

7. head, neck and arms lungs right atrium right ventricle left atrium left ventricle liver gut kidneys body and legs

8. head, neck and arms lungs right atrium right ventricle left atrium left ventricle liver gut kidneys body and legs

9. head, neck and arms lungs right atrium right ventricle left atrium left ventricle liver gut kidneys body and legs

10. head, neck and arms lungs right atrium right ventricle left atrium left ventricle liver gut kidneys body and legs

11. head, neck and arms lungs right atrium right ventricle left atrium left ventricle liver gut kidneys body and legs aorta

12. head, neck and arms lungs right atrium right ventricle left atrium left ventricle liver gut kidneys body and legs aorta inferior vena cava superior vena cava

13. head, neck and arms lungs right atrium right ventricle left atrium left ventricle liver gut kidneys body and legs aorta inferior vena cava superior vena cava pulmonary artery pulmonary vein

14. head, neck and arms lungs right atrium right ventricle left atrium left ventricle liver gut kidneys body and legs aorta inferior vena cava superior vena cava pulmonary artery pulmonary vein hepatic vein hepatic artery

15. head, neck and arms lungs right atrium right ventricle left atrium left ventricle liver gut kidneys body and legs aorta inferior vena cava superior vena cava pulmonary artery pulmonary vein hepatic vein hepatic artery renal vein renal artery

16. head, neck and arms lungs right atrium right ventricle left atrium left ventricle liver gut kidneys body and legs aorta inferior vena cava superior vena cava pulmonary artery pulmonary vein hepatic vein hepatic artery renal vein renal artery hepatic portal vein

17. head, neck and arms lungs right atrium right ventricle left atrium left ventricle liver gut kidneys body and legs aorta inferior vena cava superior vena cava pulmonary artery pulmonary vein hepatic vein hepatic artery renal vein renal artery hepatic portal vein mesenteric artery

23. cardiac muscle fibre

24. cardiac muscle fibre one muscle cell

25. cardiac muscle fibre one muscle cell nucleus

26. cardiac muscle fibre one muscle cell nucleus intercalary disc between muscle cells, these allow the rapid spread of impulses through the tissue from cell to cell

28. superior vena cava

29. superior vena cava aorta

30. superior vena cava aorta left pulmonary artery right pulmonary artery

31. superior vena cava aorta left pulmonary artery right pulmonary artery pulmonary veins pulmonary veins

32. superior vena cava aorta left pulmonary artery right pulmonary artery pulmonary veins pulmonary veins right atrium

33. superior vena cava aorta left pulmonary artery right pulmonary artery pulmonary veins pulmonary veins right atrium left atrium

34. superior vena cava aorta left pulmonary artery right pulmonary artery pulmonary veins pulmonary veins right atrium left atrium tricuspid valve

35. superior vena cava aorta left pulmonary artery right pulmonary artery pulmonary veins pulmonary veins right atrium left atrium tricuspid valve bicuspid valve

36. superior vena cava aorta left pulmonary artery right pulmonary artery pulmonary veins pulmonary veins right atrium left atrium tricuspid valve bicuspid valve right ventricle

37. superior vena cava aorta left pulmonary artery right pulmonary artery pulmonary veins pulmonary veins right atrium left atrium tricuspid valve bicuspid valve right ventricle left ventricle

38. superior vena cava aorta left pulmonary artery right pulmonary artery pulmonary veins pulmonary veins right atrium left atrium tricuspid valve bicuspid valve right ventricle left ventricle septum

39. superior vena cava aorta left pulmonary artery right pulmonary artery pulmonary veins pulmonary veins right atrium left atrium tricuspid valve bicuspid valve right ventricle left ventricle septum semi-lunar valves

40. superior vena cava aorta left pulmonary artery right pulmonary artery pulmonary veins pulmonary veins right atrium left atrium tricuspid valve bicuspid valve right ventricle left ventricle septum semi-lunar valves inferior vena cava