Fight or flee

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Fight or flee

  1. 1. ANATOMY & PHYSIOLOGY WEEKLY Volume 1, Issue 2 10.29.12 Written by– AgronDura mater: made of strong white fi- monitors for changes in internal Functions: The spinal cord per-brous tissue, serves as the outer layer of environment. forms two general functions.the meninges and also as the inner pe- Briefly, it provides conductionriosteum of the cranial bones. Where is it found : cerebrospinal routes to and from the brain and fluid is found in the subarachnoid serves as the integrator, or reflexArachnoid membrane, a delicate, coweb space around the brain and spi- center, for all spinal reflexes (2)like-layer, lies between the dura matter nal cord within the cavities andand the pia matter or innermost layer of canals of the brain and spinalthe meninges cord. Which are called ventriclesPia matter: innermost layor of the men- Spinal cord: the spinal cord liesinges. The transparent pia matter ad- in the spinal cavity, extendingheres to the outer surface of the brain from the foramen magnum to theand spinal cord and contains blood ves- lower border of the first lumbarsels vertebra, a distance of about 45 cm in the average body. TheCerebrospinal fluid: In addition to its bony spinal cord does not completelyand membranous coverings, nature has fill the spinal cavity.further protected the brain and spinalcord against injury by providing a cushionof fluid both around the organs and withinthem, it also a reservoir of circulatingfluid that, along with blood, the brain © (12) © (12) © (12) © (12) © (12) © (12) Inside this Issue Argon’s Part CNS 1,2,3 Page 1 Ashley B’s Part PNS 5,6,7,8 Page 2 Jasmine’s Part CNS 4,5,6 Page 3 Kamiera’s Part CNS 7,8,9 Page 4 Colton’s Part PNS 1,2,3,4 Page 5
  2. 2. Page 2 ANATOMY & PHYSIOLOGY WEEKLY Written By—Ashley B. purpose of the sympathetic nervous Inside the peripheral autonomic nervous sys- system is to prepare the body for nervous system there are tem functions independ- physical activity. The purpose of the two subdivisions, the so- ently and without con- parasympathic nervous system is to matic nervous system scious effort. Afferent active vegetative functions such as and the autonomic nerv- nerves are the sensory digestion, defecation, and urination. ous system. The auto- nerves that travel away (1) nomic nervous system from the central nervous includes fibers that con- system and efferent nect the CNS to viscera, nerves are the motor such as the heart, stom- nerves that travel toward ach and glands. Within the central nervous sys- the automatic nervous tem. As a whole the Auto- system it is divided into nomic Nervous System another two parts the sends impulses from the sympathetic nervous sys- central nervous system to tem and the parasympa- smooth muscle, cardiac thic nervous system. The muscle, and glands. The Autonomic Nervous System“Theautonomic © (12)functionfunctionsindependently” Efferent nerves Afferent nerves travel travel toward the away from the CNS CNS © (12)
  3. 3. VOLUME 1, ISSUE 2 Page 3Written by-Jasmine © (12) “To catch the readers attention, place an interesting sentence or quote from the story
  4. 4. VOLUME 1, ISSUE 2 Page 4Written by– Kamiera
  5. 5. Page 4Written by– Colton

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