where are ascending and descending tracts located?
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The spinal cord has numerous groups of nerve fibers going towards and coming from the brain. These have been collectively called the ascending and descending tracts of the spinal cord, respectively. The tracts are responsible for carrying sensory and motor stimuli to and from the periphery (respectively).
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Subdivisions. The large intestine is subdivided into four main regions: the cecum, the colon, the rectum, and the anus. The ileocecal valve, located at the opening between the ileum and the large intestine, controls the flow of chyme from the small intestine to the large intestine.
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The colon is also called the large intestine. The ileum (last part of the small intestine) connects to the cecum (first part of the colon) in the lower right abdomen. The rest of the colon is divided into four parts: The ascending colon travels up the right side of the abdomen.
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Ascending Aorta: The aorta has three parts: the ascending, the arch and the descending. The ascending aorta has two small branches, the left and right coronary arteries. These arteries provide blood to the heart muscle, and their blockage is the cause myocardial infarctions or heart attacks.
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The Cecum. The cecum is the most proximal part of the large intestine and is located between the ileum (distal small bowel) and the ascending colon.
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The medulla oblongata is located in the brain stem, anterior to (in front of) the cerebellum. This is a cone-shaped, neuronal (nerve cell) mass in the hindbrain, which controls a number of autonomic (involuntary) functions.
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White Columns Just as the gray matter is separated into horns, the white matter of the spinal cord is separated into columns. Ascending tracts of nervous system fibers in these columns carry sensory information up to the brain, whereas descending tracts carry motor commands from the brain.
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Descending pathways are groups of myelinated nerve fibers that carry motor information from the brain or brainstem to effector's muscles, via the spinal cord. They can be functionally divided into two groups: Pyramidal (voluntary) and extrapyramidal (involuntary) tracts.
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['The thymus: The thymus is located in the thoracic cavity, just under the neck. ... ', 'The spleen: The spleen is located in the upper-left part of the abdomen.']
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The cerebellum is located behind the brain stem. While the frontal lobe controls movement, the cerebellum “fine-tunes” this movement. This area of the brain is responsible for fine motor movement, balance, and the brain's ability to determine limb position.
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The cecum is the most proximal part of the large intestine and is located between the ileum (distal small bowel) and the ascending colon. Having served as a site for cellulose digestion in our ancestors, the cecum now simply acts as a reservoir for chyme which it receives from the ileum.
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role in vomiting …by two distinct brain centres—the vomiting centre and the chemoreceptor trigger zone—both located in the medulla oblongata. The vomiting centre initiates and controls the act of emesis, which involves a series of contractions of the smooth muscles lining the digestive tract.
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The ascending colon travels up the right side of the abdomen. The transverse colon runs across the abdomen. The descending colon travels down the left abdomen.
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The brain is composed of 3 main structural divisions: the cerebrum, the brainstem, and the cerebellum (see the images below). At the base of the brain is the brainstem, which extends from the upper cervical spinal cord to the diencephalon of the cerebrum. The brainstem is divided into the medulla, pons, and midbrain.
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KEY POINTS Except for the spinal cord, the brain's lower-level structures are largely located within the hindbrain, diencephalon (or interbrain), and midbrain. The hindbrain consists of the medulla oblongata, the pons, and the cerebellum, which control respiration and movement among other functions.
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There are five distinct regions of the vertebral column. From superior to inferior, these are: Cervical – 7 vertebrae (C1 = highest; C7 = lowest) Thoracic – 12 vertebrae (T1 = highest; T12 = lowest)
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A vertical osmotic gradient established in the renal medulla is the cornerstone of the process. ->This vertical gradient must be both established and maintained. The loop of Henle is responsible for ESTABLISHING the gradient and the vasa recta MAINTAINS the gradient.