Natural science sciences, there are three great branches of "natural science" which stand apart by reason of the variety of far reaching deductions drawn from a small number of primary postulates — they are mechanics, electrodynamics, and thermodynamics. Today, natural sciences are more commonly divided into life sciences, such as botany and zoology; and physical sciences, which include physics, chemistry, geology, astronomy, and materials science. Natural science Natural science is a branch of science concerned with the description, prediction, and understanding of natural phenomena, based on empirical evidence from observation and experimentation. Mechanisms such as peer review and repeatability of findings are
Posterior branches of thoracic nerves Posterior branches of thoracic nerves The posterior branches of thoracic nerves branch from the dorsal rami of the thoracic nerves. The medial branches of the posterior divisions of the "upper six" thoracic nerves run between the semispinalis dorsi and multifidus, which they supply. They then pierce the rhomboidei and trapezius, and reach the skin by the sides of the spinous processes. The medial branches of the "lower six" are distributed chiefly to the multifidus and longissimus, occasionally they give off filaments to the skin near the middle line. The lateral branches increase in size from above downward. They run through