Blood, Growth, and Nature's Math

This chapter delves into the intricate roles of blood in human physiology, comparing the closed circulatory system of humans to the open circulatory system of insects and exploring the unique characteristics of hemolymph. It further shifts focus to plants, examining how meristematic cells enable growth and the importance of the hormone auxin in regulating branching. The discussion is enriched with insights into how plants utilize mathematical principles like the golden ratio for optimal leaf and branch arrangement.