bio

• command center of the entire body

  consists of the body and spinal cord

  interpret the information and issuing appropriate command

  
  

  central nervous system
• made up of large mass of nerve tissue thats protected within skull

  brain
• refer to the membrous coverings of the brain and spinal cord

  meninges
• bathe the cns and cushions it from bumps and thuds

  cerebrospinal fluid
• 3 regions of the brain

  forebrain

  mindbrain

  hindbrain
• largest part of your brain that handles conscious thoughts and actions

  seat of intellegence: thinking etc.

  Cerebrum/Cerebral Cortex
• associated with muscle coordination, posture

  and balance.

  second largest part of

  the brain

  Cerebellum
• links your brain to your spinal cord

  ✓ responsible for sleep

  regulation.

  Pons
• ropelike segment of nerve

  tissue extending from the

  medulla oblongata to the

  vertebral column

  serves as connector

  mechanism for spinal

  reflexes and the

  connecting link between

  PNS and the brain.

  Spinal Cord
• ✓ all the nerves that lie outside of

  the central nervous system

  (CNS)

  ✓ gathers and delivers

  information to and from the

  CNS

  Peripheral Nervous System
• how many pairs of nerves make up the peripheral nervous system

  43 pairs
• how many cranial nerves

  12 pairs
• spinal nerves

  31 pairs
• ✓ stimulates skeletal

  muscles under conscious

  control

  ✓ consists of cranial and

  spinal nerves

  Somatic Nervous System
• regulating involuntary

  body functions, such

  as blood flow,

  heartbeat, digestion,

  and breathing

  Autonomic Nervous System
• controls the “fight-or-flight” response during

  stressful situations

  dominates in times of physical or emotional

  stress or whenever the body requires some

  action

  Sympathetic mechanism
• allows us to return our

  bodies to a normal resting state.

  Parasympathetic mechanism
• source of sensory information except smell

  sorts and relay incoming and outgoing information to the different parts of the brain

  thalamus
• monitors pleasurable activities like eating and

  drinking.

  influences the endocrine

  system (pituitary gland) in

  secreting hormones in

  response to different

  emotions, stress, and

  rewarding feelings

  hypothalamus
• relays signals, particularly those

  coming from the eyes and the

  ears, to the cerebellum.

  processes visual and auditory

  reflexes

  responsible for the general levels

  of lethargy or liveliness.

  Reticular formation
• associated with maintaining vital functions like

  breathing and circulation.

  ✓ controls autonomic

  functions

  Medulla oblongata
• portion of the cerebral cortex concerned with the sence of smell

  olfactory cortex