www.juniorscience.ie 1b3 sensory system. 1b3 sensory system ob28 recall five sense organs in the...
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1B3 Sensory System
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
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 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
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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
click for labels
eyeball
eyelash
skull bone
optic nerve
muscle
eyelid
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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
click to see
sensory nerves bring message to brain
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structure of the ear
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
ear dru
m
senso
ry nerv
e
sensory cells
skull bone
click to see labels
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how the ear 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
1. sound waves directed into the ear…
2. sound waves directed to the ear drum
3. sound energ
y vibrate
s ear
drum
5. Senso
ry nerv
e take
s
message to
brain
4. Vibrations are passed to sensory nerves
click to see
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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
information about sound travels to brain via sensory
nerves
“hello”“hell
o”sound
sound
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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
structure of the nose
click for labels
nose
blood supply
skull bone
nerve to brain
sensory nerves
nostril
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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 nose gathers information
click to see
3. Message brought to brain
2. chemical in air affect sensory nerves
1. air enters t
he nostrils
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information about smell travels to brain via sensory nerve
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
“whiff”
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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
structure of the skin
click for labels
hair
sweat pore
sweat gland
fat cells muscle
sensory nerves
blood vessels
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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 skin gathers information
click to see
Information about pain, pressure, touch, temp. is sent via sensory nerves to the brain
“ouch”
“brrr”
“phew”
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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
tongue contains sensory neurons in taste buds
click to see how it works
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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 taste buds gather information
humans detectfour tastes: sweet, sour, salt and bitter
sensory nerves bring messages to the brain
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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?
