1B3 Sensory System

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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 www.juniorscience.ie

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 SENSE ORGAN HOW THESE ENABLE US TO GATHER INFORMATION eyes ears nose skin tongue images of what we see are sent to the brain sounds that we hear are sent to the brain we detect chemicals in the air that we breathe and send messages to let the brain know about them nerve cells in our skin detect touch, heat, cold, pressure, pain and bring this information to the brain taste buds detect chemicals in food and send messages to brain www.juniorscience.ie

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 eyeball muscle optic nerve skull bone www.juniorscience.ie

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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 how the eyes gather information www.juniorscience.ie

click to see sensory nerves bring message to brain

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 external ear ear canal sensory cells skull bone structure of the ear click to see labels www.juniorscience.ie

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 1. sound waves directed into the ear… 4. Vibrations are passed to sensory nerves 2. sound waves directed to the ear drum www.juniorscience.ie

how the ear gathers information click to see

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 information about sound travels to brain via sensory nerves www.juniorscience.ie

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 nose skull bone nerve to brain sensory nerves structure of the nose www.juniorscience.ie

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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. Message brought to brain 2. chemical in air affect sensory nerves www.juniorscience.ie

click to see how the nose gathers information

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 information about smell travels to brain via sensory nerve www.juniorscience.ie

“whiff”

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 hair sweat pore sweat gland fat cells structure of the skin click for labels www.juniorscience.ie

blood vessels sensory nerves muscle

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 “phew” “brrr” “ouch” www.juniorscience.ie

how the skin gathers information click to see Information about pain, pressure, touch, temp. is sent via sensory nerves to the brain

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 tongue contains sensory neurons in taste buds www.juniorscience.ie

click to see how it works

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 humans detect four tastes: sweet, sour, salt and bitter how the taste buds gather information sensory nerves bring messages to the brain 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?

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1B3 Sensory System

www.juniorscience.ie