Sensitivity and coordination

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Sensitivity and coordination

  1. 1. SENSITIVITY AND COORDINATION BY Seila matellan, Mario martin , Mario prieto and Celia martin
  2. 2. Stimuli and responses <ul><li>A stimulus is anything that affects any of the body`s acivities.There are two types of stimuli: -Internal, they come from inside our bodies,like the feelings of hunger or thirst. External, these come from outside the body like the smell of a cake or the texture of a cloth </li></ul><ul><li>A responses is the body´s answer to a stimulus </li></ul>
  3. 3. Stimuli receptors <ul><li>Iternal receptors: They receive the internal stimuli our bodies produce. </li></ul><ul><li>External receptors: They receive external stimuli.They are in the sensory organs. </li></ul>
  4. 4. Responses <ul><li>Muscular responses.These are movements the muscles make in response to a stimulus. </li></ul><ul><li>Glandular responses.These are when galnds produce various substances in response to a stimulus, like when you sweat. </li></ul>
  5. 5. The senses -Sight <ul><li>The eye is the body´s organ for the sense of sight.The eye is made up of the eyeball and protected by the eyebrows, eyelids and eyelashes: When light reaches the eyeball, it goes through the cornea.Then it goes through the pupil then passes through the lens which focuses the image on the retina . </li></ul>
  6. 6. The senses-Hearing <ul><li>The ear is the body´s organ for the sense of hearing.The ear has three parts: -The outer ear. It is made up of the ear and outer auditory canal. -The middle ear it is made up of the eardrum and a chain of samll bones . -The inner ear. It is made up of the cochlea and the auditory nerve. </li></ul>
  7. 7. The senses-Touch <ul><li>The body´s organ for the sense of touch is the skin. The skin is made up of three layers: -Epidermis It is the outer layer -Dermis It is under the epidermis -Hypodermis It is under the dermis </li></ul>
  8. 8. The senses-Smell and taste <ul><li>The organ for the sense of smell is the nose. Receptors of smell are in the pituitary </li></ul><ul><li>The organ for the sense of taste is the tongue. Repetors for different flavours are in the taste buds. </li></ul>
  9. 9. The central nervous system <ul><li>It has two parts -Brain it is inside the skull. It has three main parts: the cerebrum the cerebellum and the brain stem -Spinal cord it is a thick cord made up of many neurons that goes through the inside of the spine. It is protected by vertebrae. </li></ul>
  10. 10. The peripheral nervous system <ul><li>It is made up of nerves -Sensory nerves -Motor nerves </li></ul>
  11. 11. Neurons <ul><li>Neurons are cells that belong to the nervous system.They are made up of three parts: a cell body, dendrites and axons </li></ul>
  12. 12. Voluntary and involuntary movements <ul><li>Nerves carry sensory information to the brain which produces a response that moves through the motor nerves that transmit them to the muscles </li></ul><ul><li>The spinal cord controls the body´s reflexes which are involuntary. </li></ul>
  13. 13. <ul><li>MADE BY: YOUR KIDS </li></ul><ul><li>ILUSTRATIONS MADE BY: WHO KNOWS IT? </li></ul>

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