Nervous and Circulatory System

By : Nash Tannehill

Nervous System

The Nervous System allows us to perceive, comprehend and respond to the world. The Central Nervous System includes the brain and spinal cord, evaluates info and initiates responses. The Peripheral Nervous System is made up of nerves connecting the brain and spinal cord to other parts of the body.

Parts of the Nervous System

  • Sensory neutron - responsible for converting external stimuli that comes from the environment into corresponding internal stimuli.
  • Motor Neutron - projects its axon outside the CNS and directly or indirectly control the muscles.
  • Cerebellum - Coordinates body movements and helps maintain equilibrium.
  • Brain stem - Controls the flow of messages between the brain and the rest of the body.

Circulatory System

The Circulatory System is responsible for transporting materials throughout the body. Arteries carry oxygenated blood away from the heart to the tissues and veins carry deoxygenated blood back to the heart. The capillaries are sites of the transfer of oxygen and other nutrients from the bloodstream to other tissues in the body.

Parts and Diseases of the Circulatory System

Parts

  • Plasma : a clear extracellular fluid
  • Erythrocytes : Red blood cells
  • Leukocytes : White blood cells
  • Platelets : disc shaped cells circulation in the blood



Diseases

  • Ischemia : Not getting enough blood, feels like a heart attack and TPA dissolves the clot.
  • Atherosclerosis : The hardening of the fat, high blood pressure and changes in diet and medications help.