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Anatomy

Weeks 6-12

TermDefinition
urethral sphincter Constriction of muscles, which encircle the urethra in both sexes, helps control urine flow.
erector spinae muscle group consists of a number of long, thin muscles that travel all the way down our backs. These muscles extend (straighten or pull back) the vertebral column and also flex the back laterally and rotate it a little.
perineum The muscular pelvic floor filling the diamond-shaped outlet
insertion Is the point of attachment that moves when the muscle contracts. The insertion bone therefore moves along a “line of force” toward the origin bone when the muscle shortens.
fascia Fibrous connective tissue surrounding the muscle organ and located outside the epimysium and tendon. Is a general term for the fibrous connective tissue found under the skin and surrounding many deeper organs, including skeletal muscles and bones.
astrocytes Found only in the CNS, they are the largest and most numerous type of glia. Their long, delicate “points” extend through brain tissue, attaching to both neurons and the tiny blood capillaries of the brain.
enteric nervous system (ENS) is a so-called “second brain” in the wall of the gut. The term enteric means “intestinal,” so you can think of this system as the “intestinal nervous system.”
somatic nervous system (SNS) regulates the somatic effectors, which are the skeletal muscles.
efferent division of the nervous system consists of all the outgoing motor or efferent pathways.
afferent division of the nervous system consists of all of the incoming sensory or afferent pathways.
Central nervous system (CNS) the structural and functional center of the entire nervous system. Consisting of the brain and spinal cord, the CNS integrates incoming pieces of sensory information, evaluates the information, and initiates an outgoing response.
Created by: richelle28
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