Chapter 19 Blood Vessels Part1

1:10:35
Chapter 19 Blood Vessels Part 2

49:23
Chapter 19 Blood Vessels - Parts A and B

1:01:03
Chapter 18 The Heart Part 1

54:38
Structure of Blood Vessels and Blood

1:07:34
Chapter 17 Blood Part1

36:56
Chapter 19: Cardiovascular System, Blood Vessels - Part I

40:46
Chapter 23 Digestive System Part1

50:30