Branches of science much as it involves a clearly biological aspect. While biology remains the centerpiece of life science, technological advances in molecular biology and biotechnology have led to a burgeoning of specializations and new, often interdisciplinary, fields. "Biology" is the branch of natural science concerned with the study of life and living organisms, including their structure, function, growth, origin, evolution, distribution, and taxonomy. Biology is a vast subject containing many subdivisions, topics, and disciplines. Zoology, occasionally spelled zoölogy, is the branch of science that relates to the animal kingdom, including the structure, embryology, evolution, classification, habits, and distribution of all animals, both
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