The Brain Essay

338 WordsAug 23, 20122 Pages
The Brain The human body is a complicated machine made of cells, organs, and systems, and all of them are controlled by the brain. The human brain serves as the central core of the nervous system. Quite possibly the most fascinating and complex organ, the brain controls the human body, and without it a person cannot survive. In order to truly understand the behavior of the brain, we need to look at the brain's structure as well as its anatomy. The brain weighs 3 pounds, and is made from 78% water, 10% fat and 8% protein, and a living brain can be so soft it can be cut with a butter knife. Of all the brain, the cerebrum or cortex is the largest part, which is sub-divided into four lobes; frontal lobe, parietal lobe, occipital lobe, and temporal lobe. The frontal lobe is located in the forehead, and is made of the interior and posterior portion. The interior portion of this lobe is in charge of cognitive functions and the posterior lobe of the premotor and motor skills. The parietal lobe is at the top back of the brain, and is responsible for the sensory information from parts of the body. The optic nerves, processing information, movement, speech, recognition, pain and perception are some of the function of the parietal lobe. The smallest of the lobes, the occipital lobe is locates in the final part of the skull. This lobe is responsible for visual perception system, as it contains the primary visual cortex. Functions of this lobe are visual reception, visual-spatial processing, movement and color recognition. The disorders of the occipital lobe can cause visual illusions. The temporal lobe is in both sides of the brain and above the ears. This lobe contains the primary auditory cortex, also contain the hippocampus, responsible of long-term memory and organizing new information. Functions of both temporal lobes consist of distinguishing smell and sound. They

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