Sensitivity and coordination

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  • 1. SENSITIVITY AND COORDINATION BY Seila matellan, Mario martin , Mario prieto and Celia martin
  • 2. Stimuli and responses
    • 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
    • A responses is the body´s answer to a stimulus
  • 3. Stimuli receptors
    • Iternal receptors: They receive the internal stimuli our bodies produce.
    • External receptors: They receive external stimuli.They are in the sensory organs.
  • 4. Responses
    • Muscular responses.These are movements the muscles make in response to a stimulus.
    • Glandular responses.These are when galnds produce various substances in response to a stimulus, like when you sweat.
  • 5. The senses -Sight
    • 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 .
  • 6. The senses-Hearing
    • 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.
  • 7. The senses-Touch
    • 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
  • 8. The senses-Smell and taste
    • The organ for the sense of smell is the nose. Receptors of smell are in the pituitary
    • The organ for the sense of taste is the tongue. Repetors for different flavours are in the taste buds.
  • 9. The central nervous system
    • 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.
  • 10. The peripheral nervous system
    • It is made up of nerves -Sensory nerves -Motor nerves
  • 11. Neurons
    • Neurons are cells that belong to the nervous system.They are made up of three parts: a cell body, dendrites and axons
  • 12. Voluntary and involuntary movements
    • Nerves carry sensory information to the brain which produces a response that moves through the motor nerves that transmit them to the muscles
    • The spinal cord controls the body´s reflexes which are involuntary.
  • 13.