1. Introduction to the Senses Gather and synthesize information that sensory receptors respond to stimuli by sending messages to the brain for immediate behavior or storage as memories. NGSS MS-LS1-8 and MS-LS1-3

2. Structure fits function in the human body.  Anatomy : the study of the structure of an organism and its parts.  Physiology : the study of what structures do and how they do it.

3. Levels of Body Structure  Cell: basic unit of living matter  Tissue : a cooperating unit of many cells that perform a specific function.  Organ: consists of several tissues that together perform a specific function.  Organ system : consists of multiple organs that together perform a vital body function.

4. The body regulates its internal environment.  Homeostasis: the internal stability or “steady state” maintained by your body.

5. Sensory receptors link the environment to the nervous system.  Sensation : When sensory information reaches your brain and you are aware of these sensory stimuli.  Perception : The brain integrates new information and forms meaningful interpretations of sensory data.

6. Sensation and Perception

10. Perceptions  Are meaningful interpretations of sensory data

11.  Sensory receptors detect stimuli, such as light, sounds, and skin temperature, and send the information to the Central Nervous System (CNS).  These receptors are found in high concentrations in your sense organs.  Sense organs:  Nose = olfactory sense  Eyes = vision  Ears = auditory sense  Mouth = gustatory system is the sensory system for the sense of taste.  Skin = integumentary system (the largest organ)

12. The nervous system links sensation to response.  Structure and Functions of the Nervous System  The nervous system is made up of many types of neurons, they all have specialized structures that enable them to convey electrical signals.  The organs of the nervous system form two subsystems.

13. Central Nervous System (CNS):  made up of the brain and the spinal cord and is the main information processing center of the body

14. Peripheral Nervous System (PNS):  made up of all the nervous tissue outside the CNS.  The PNS delivers information to the CNS and carries messages from the CNS to other organs.

15. PNS  Sensory Input: The PNS receives information about an environmental change, or stimulus and sensory neurons carry the information about the stimuli to the CNS.  Integration: The CNS interprets the information using interneurons and plans your bodies response.  Motor Output: The CNS orders a response. These signals are carried away from the CNS by motor neurons.