A Glance into the Human Brain – Structure and Functions of the Human Brain (Human Brain’s Anatomy and Physiology) – A Voyage Into the Human Brain!
This article describes the structure of human brain (anatomy of human brain) and functions of human brain (physiology of human brain), which is the most complex and mysterious organ of the human body. This article is expected to cater the needs of a variety of audiences including the students, teachers, healthcare professionals, and the laymen. The article has been written in an easy-to-understand language and richly annotated with definitions of difficult medical terms including etymologies.
The human brain is the most sophisticated organ of the human body, and can aptly be called as a biological marvel. The brain and the spinal cord constitute the central nervous system (CNS). The brain plays the role of the control tower or control center of the human body, and relies on a vast network of nerves (bundles of fibers of nervous tissue carrying impulses) spread throughout the body. Nerves can be compared to the electrical wiring as they carry electrical impulses.
Noteworthy Facts about the Human Brain!
- The brain of human beings resembles a small cauliflower in its size and appearance.
- Human brain is comprised of about 100 billion neurons or nerve cells.
- The weight of an adult human brain is about 1300 g (about 3 pounds), whereas the weight of a newborn’s brain lies in the range of 350 – 400 g.
- Although the brain of a human being accounts for only 2 % of the total body weight, it utilizes 20 % of the of the resting total body oxygen consumption.
- Human brain contains 77 to 78 % water, 10 to 12 % lipids, 8 % proteins, 2 % soluble organic substances, 1 % carbohydrates, and 1 % inorganic salts.
- The cerebral cortex forms 77% by volume of the human brain.
- Cerebrum is the largest part of the human brain, whereas Cerebellum is the second largest.
- Left side of the brain (left cerebral hemisphere) controls the right side of the body, whereas the right side of the brain (right cerebral hemisphere) controls the left side of the human body.