Control and Coordination (Chapter 7) - PPT, Class 10 Science PDF Download

 Page 1


* CHAPTER - 7 
CONTROL  AND  
COORDINATION 
MADE BY-: 
 RAHAT 
Page 2


* CHAPTER - 7 
CONTROL  AND  
COORDINATION 
MADE BY-: 
 RAHAT 
     The changes in the environment to which living 
organisms respond are called stimuli. 
  Eg :- heat, cold, sound, smell, taste, touch, pressure, 
gravity, water etc.  
   Living organisms respond to stimuli in the form of body 
movements.  
b) Coordination :- 
   For a proper response to a stimulus many organs in the 
body should work together. The working together of various 
organs in an organism to produce a proper response to a 
stimulus is called coordination. 
 i) In animals control and co ordination is done by the 
nervous system and endocrine system.  
ii) In plants control and co ordination is done by chemical 
substances called plant hormones or phytohormones.  
* 1a) Stimuli :- 
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Page 3


* CHAPTER - 7 
CONTROL  AND  
COORDINATION 
MADE BY-: 
 RAHAT 
     The changes in the environment to which living 
organisms respond are called stimuli. 
  Eg :- heat, cold, sound, smell, taste, touch, pressure, 
gravity, water etc.  
   Living organisms respond to stimuli in the form of body 
movements.  
b) Coordination :- 
   For a proper response to a stimulus many organs in the 
body should work together. The working together of various 
organs in an organism to produce a proper response to a 
stimulus is called coordination. 
 i) In animals control and co ordination is done by the 
nervous system and endocrine system.  
ii) In plants control and co ordination is done by chemical 
substances called plant hormones or phytohormones.  
* 1a) Stimuli :- 
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          In animals control and co ordination is done by the nervous system  
     and endocrine system.  
        The nervous system consists of the brain, spinal cord and nerves. 
a) Receptors :- are the sense organs which receive the stimuli and  
     pass the message to the brain or spinal cord through the sensory  
     nerves. 
     Eg :- Photoreceptors in the eyes to detect light.  
              Phonoreceptors in the ears to detect sound. 
              Olfactory receptors in the nose to detect smell. 
              Gustatory receptors in the tongue to detect taste. 
              Tangoreceptors in the skin to detect touch.  
b) Effectors :- are the muscles and glands which respond to the  
     information from the brain and spinal cord through the motor nerves. 
c) Sensory nerves :- are nerves which carry information from the  
     receptors (sense organs) to the brain and spinal cord. 
d) Motor nerves :- are nerves which carry information from the brain  
     and spinal cord to the effectors (muscles and glands). 
 
* 2) Coordination in animals :- 
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Page 4


* CHAPTER - 7 
CONTROL  AND  
COORDINATION 
MADE BY-: 
 RAHAT 
     The changes in the environment to which living 
organisms respond are called stimuli. 
  Eg :- heat, cold, sound, smell, taste, touch, pressure, 
gravity, water etc.  
   Living organisms respond to stimuli in the form of body 
movements.  
b) Coordination :- 
   For a proper response to a stimulus many organs in the 
body should work together. The working together of various 
organs in an organism to produce a proper response to a 
stimulus is called coordination. 
 i) In animals control and co ordination is done by the 
nervous system and endocrine system.  
ii) In plants control and co ordination is done by chemical 
substances called plant hormones or phytohormones.  
* 1a) Stimuli :- 
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          In animals control and co ordination is done by the nervous system  
     and endocrine system.  
        The nervous system consists of the brain, spinal cord and nerves. 
a) Receptors :- are the sense organs which receive the stimuli and  
     pass the message to the brain or spinal cord through the sensory  
     nerves. 
     Eg :- Photoreceptors in the eyes to detect light.  
              Phonoreceptors in the ears to detect sound. 
              Olfactory receptors in the nose to detect smell. 
              Gustatory receptors in the tongue to detect taste. 
              Tangoreceptors in the skin to detect touch.  
b) Effectors :- are the muscles and glands which respond to the  
     information from the brain and spinal cord through the motor nerves. 
c) Sensory nerves :- are nerves which carry information from the  
     receptors (sense organs) to the brain and spinal cord. 
d) Motor nerves :- are nerves which carry information from the brain  
     and spinal cord to the effectors (muscles and glands). 
 
* 2) Coordination in animals :- 
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* HUMAN NERVOUS SYSTEM 
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Page 5


* CHAPTER - 7 
CONTROL  AND  
COORDINATION 
MADE BY-: 
 RAHAT 
     The changes in the environment to which living 
organisms respond are called stimuli. 
  Eg :- heat, cold, sound, smell, taste, touch, pressure, 
gravity, water etc.  
   Living organisms respond to stimuli in the form of body 
movements.  
b) Coordination :- 
   For a proper response to a stimulus many organs in the 
body should work together. The working together of various 
organs in an organism to produce a proper response to a 
stimulus is called coordination. 
 i) In animals control and co ordination is done by the 
nervous system and endocrine system.  
ii) In plants control and co ordination is done by chemical 
substances called plant hormones or phytohormones.  
* 1a) Stimuli :- 
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          In animals control and co ordination is done by the nervous system  
     and endocrine system.  
        The nervous system consists of the brain, spinal cord and nerves. 
a) Receptors :- are the sense organs which receive the stimuli and  
     pass the message to the brain or spinal cord through the sensory  
     nerves. 
     Eg :- Photoreceptors in the eyes to detect light.  
              Phonoreceptors in the ears to detect sound. 
              Olfactory receptors in the nose to detect smell. 
              Gustatory receptors in the tongue to detect taste. 
              Tangoreceptors in the skin to detect touch.  
b) Effectors :- are the muscles and glands which respond to the  
     information from the brain and spinal cord through the motor nerves. 
c) Sensory nerves :- are nerves which carry information from the  
     receptors (sense organs) to the brain and spinal cord. 
d) Motor nerves :- are nerves which carry information from the brain  
     and spinal cord to the effectors (muscles and glands). 
 
* 2) Coordination in animals :- 
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* HUMAN NERVOUS SYSTEM 
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 a) Parts of the nervous system :- 
      The human nervous system consists of the Central Nervous System  
      and Peripheral Nervous System. 
 i) The central nervous system :- consists of the brain, and spinal  
     cord. 
ii) The peripheral nervous system:- consists of cranial nerves  
     arising from the brain and spinal nerves arising from the spinal cord.  
* 3) Human nervous system :- 
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