Aim: What are the parts of the Aim: What are the parts of the human brain and what is the human brain and what is the

function of each part?function of each part?Do Now: Copy down functions Do Now: Copy down functions

on diagram handouton diagram handout

(DO NOT COPY THIS PART)(DO NOT COPY THIS PART)Why is it appropriate to say the Why is it appropriate to say the weight of the brain determines weight of the brain determines intelligence?intelligence?

AnimalAnimal Wt. of BrainWt. of Brain Brain/Body wt Brain/Body wt ratioratio

• Whale 15 lbs 1/10000Whale 15 lbs 1/10000

• Elephant 13 lbs 1/1000Elephant 13 lbs 1/1000

• Human 3 lbs 1/50Human 3 lbs 1/50

The human brain is The human brain is more developedmore developed and and has a has a larger weight in proportionlarger weight in proportion to to total body weight.total body weight.

Summary:Summary:The human brain has 3 main The human brain has 3 main parts:parts:• CerebrumCerebrum

– Largest part of the human brain. Controls Largest part of the human brain. Controls thinking, speech, vision, hearing and all thinking, speech, vision, hearing and all voluntary acts.voluntary acts.

• CerebellumCerebellum– Controls balance and muscle coordinationControls balance and muscle coordination

• MedullaMedulla– Controls all involuntary acts (breathing, Controls all involuntary acts (breathing,

heart beat, digestion, reflexes)heart beat, digestion, reflexes)

Summary Continued:Summary Continued:

If our brain is so important, how do If our brain is so important, how do we protect it?we protect it?

•Cranium (skull bones)Cranium (skull bones)

•Meninges (protective membrane Meninges (protective membrane that surrounds the brain)that surrounds the brain)

What about our spinal cord?What about our spinal cord?

•Protected by bones called Protected by bones called vertebraevertebrae

After you are done After you are done labeling…labeling…

CCoolloorr each part of the brain in your each part of the brain in your diagram and make sure you diagram and make sure you labeled the functions from the labeled the functions from the Do NowDo Now

There will be There will be exam #1exam #1 on Friday. on Friday. (Don’t forget that your paper is (Don’t forget that your paper is due this Friday as well.)due this Friday as well.)

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