1. www.juniorscience.ie 1B3 Sensory System

2. www.juniorscience.ie 1B3 Sensory System OB28 recall five sense organs in the human (eyes, ears, nose, skin, and tongue) and understand how these enable humans to gather information from their surroundings

3. www.juniorscience.ie OB28recall five sense organs in the human (eyes, ears, nose, skin, and tongue) and understand how these enable humans to gather information from their surroundings SENSE ORGANHOW THESE ENABLE US TO GATHER INFORMATION eyes images of what we see are sent to the brain ears sounds that we hear are sent to the brain nose we detect chemicals in the air that we breathe and send messages to let the brain know about them skin nerve cells in our skin detect touch, heat, cold, pressure, pain and bring this information to the brain tongue taste buds detect chemicals in food and send messages to brain

4. www.juniorscience.ie OB28recall five sense organs in the human (eyes, ears, nose, skin, and tongue) and understand how these enable humans to gather information from their surroundings click for labels eyeball eyelash skull bone optic nerve muscle eyelid

5. www.juniorscience.ie OB28recall five sense organs in the human (eyes, ears, nose, skin, and tongue) and understand how these enable humans to gather information from their surroundings how the eyes gather information click to see sensory nerves bring message to brain

6. www.juniorscience.ie structure of the ear OB28recall five sense organs in the human (eyes, ears, nose, skin, and tongue) and understand how these enable humans to gather information from their surroundings external ear ear canal ear drum sensory nerve sensory cells skull bone click to see labels

7. www.juniorscience.ie how the ear gathers information OB28recall five sense organs in the human (eyes, ears, nose, skin, and tongue) and understand how these enable humans to gather information from their surroundings 1. sound waves directed into the ear… 2. sound waves directed to the ear drum 3. sound energy vibrates ear drum 5. Sensory nerve takes message to brain 4. Vibrations are passed to sensory nerves click to see

8. www.juniorscience.ie OB28recall five sense organs in the human (eyes, ears, nose, skin, and tongue) and understand how these enable humans to gather information from their surroundings information about sound travels to brain via sensory nerves “hello” sound

9. www.juniorscience.ie OB28recall five sense organs in the human (eyes, ears, nose, skin, and tongue) and understand how these enable humans to gather information from their surroundings structure of the nose click for labels nose blood supply skull bone nerve to brain sensory nerves nostril

10. www.juniorscience.ie OB28recall five sense organs in the human (eyes, ears, nose, skin, and tongue) and understand how these enable humans to gather information from their surroundings how the nose gathers information click to see 3. Message brought to brain2. chemical in air affect sensory nerves 1. air enters the nostrils

11. www.juniorscience.ie information about smell travels to brain via sensory nerve OB28recall five sense organs in the human (eyes, ears, nose, skin, and tongue) and understand how these enable humans to gather information from their surroundings “whiff”

12. www.juniorscience.ie OB28recall five sense organs in the human (eyes, ears, nose, skin, and tongue) and understand how these enable humans to gather information from their surroundings structure of the skin click for labels hair sweat pore sweat gland fat cells muscle sensory nerves blood vessels

13. www.juniorscience.ie OB28recall five sense organs in the human (eyes, ears, nose, skin, and tongue) and understand how these enable humans to gather information from their surroundings how the skin gathers information click to see Information about pain, pressure, touch, temp. is sent via sensory nerves to the brain “ouch” “brrr” “phew”

14. www.juniorscience.ie OB28recall five sense organs in the human (eyes, ears, nose, skin, and tongue) and understand how these enable humans to gather information from their surroundings tongue contains sensory neurons in taste buds click to see how it works

15. www.juniorscience.ie OB28recall five sense organs in the human (eyes, ears, nose, skin, and tongue) and understand how these enable humans to gather information from their surroundings how the taste buds gather information humans detect four tastes: sweet, sour, salt and bitter sensory nerves bring messages to the brain

16. www.juniorscience.ie What do you think? 1.Why do you think humans have just one nose and one tongue, one skin but two eyes and two ears? 2.People who smoke often cannot taste their food. Why do you think this is? 3.Some babies are born with no sense of pain. Why can this be very dangerous for them?

17. www.juniorscience.ie 1B3 Sensory System