Through the lungs we exchange breathing with the plants. We breath in the breath they breathe out, and they breathe in the breath we breathe out. In the process of breathing, the lungs rhythmically embrace gently the heart.
The cardiovascular system is composed of one continuous cyclical series of looping tubules with our heart at the center of their convergence and transformation.
The brain has a right and left side. Each half registers the sensations arising on its side of the body. Each half witnesses the sensations occurring on the opposite side of the body. Therefore the right side of the brain registers sensations arising from the right side of the body and witnesses the sensations arising on the left side of the body. The left side of the brain registers the sensations arising on the left side of the body and witnesses the sensations arising on the right side of the body.