Sensitivity and Coordination by Marcos
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Sensitivity and Coordination by Marcos Presentation Transcript

  • 1. SENSITIVITY AND COORDINATIONBY MARCOS SÁNCHEZ Marcos Sánchez Herrero. 6ºB
  • 2. STIMULUS AND RESPONSE Stimuli A stimulus is anything you see, hear, touch, smell or taste. Stimuli can be internal or external:  Internal stimuli come from inside our bodies. External stimuli come from outside the body.The body has different receptors to recive different types of stimuli.  Internal receptors recive the internal stimuli our bodies produces  External receptors recive external stimuli. They are in the sensory organs: the eyes, the nose, the tongue, the ears and the skin. Responses o A response is the body´s answer to a stimulus. o There are two types of responses: - Muscular responses. - Glandular responses.
  • 3. THE SENSES Sight:The eye is the organ of sight, It is made up of the eyeball and protected by the eyebrows, eyelids and eyelashes. 1º.- First light goes through the cornea. 2º.- Then ligh passes through the pupil, the opening of the iris. 3º.- After that light passes through the lens which focuses the image on the retina. 4º.- Finally the information in the retina travels to the brain through the optic nerve. SmellThe nose is the organ of smell. The receptors of smell are in the pituitary gland, inside the nostrils. Pituitary Nostrils
  • 4.  HearingThe ear is the organ of hearing. 1º.- The outer ear receives sounds. 2º.- The middle ear changes sounds into vibrations. 3º.- The inner ear changes vibrations into nerve impulses that go to the brain TouchThe skin is the organ of touch. It is made up of three layers. Epidermis Dermis Hypodermis  Taste The tongue is the organ of taste. The receptors of taste are in the taste buds. Taste buds There are taste buds all around the tongue.
  • 5. WHAT IS THE NERVOUS SYSTEM? The nervous systemThe nervous system is made up of nerve centres and nerves.- The central nervous system has two parts:- * The brain is inside the skull. Il is made up of the cerebrum, the cerebellum and the brain stem.- * The spinal cord is made up of many neurons. It is protected by vertabrae.- - The peripheral nervous sistem is made up of:- * Sensory nerves.- * Motor nerves. NeuronsBoth the central and peripheral nervous systems are made up of specialised cells called neurons.They are made up of a: -cell body. -dentrites. -axons.
  • 6. VOLUNTARY AND INVOLUNTARY MOVEMENTS Voluntary movements:The brain produces a response in the case of voluntary movements. Involuntary movements:The spinal cord produces a response in the case of involuntary movements.
  • 7. THE SKELETAL AND MUSCULAR SYSTEM The skeleton Joints The joints are located where two or more bones meet. There are three types of joints: • Moveable joints. • Semi-moveable joints. • Fixed joints. skull bones lower limb bones
  • 8. The musculature Head muscles Trunk muscles Limb muscles TendonsTendons are made up of flexible and fibrous tissues.