10:58duration 10 minutes 58 seconds
Ch 21 IX - Big Picture
Ch 21 objectives 12-34.
17:34duration 17 minutes 34 seconds
Ch 21 III - Cells of the Adaptive Immune System
Ch 21 objectives 20-22.
25:11duration 25 minutes 11 seconds
CH 20 II - Lymphatic Organs
Ch 20 and 21 objectives 5-11.
15:03duration 15 minutes 3 seconds
Ch 20 I - Lymphatic Vessels
Ch 20 and 21 objectives 1-4.