What is the brain made of If you
What is the brain made of?
If you don’t know what the brain is made of… Let’s make a hypothesis!
What is a Hypothesis? A hypothesis is a guess about the answer to a question. Scientists often use previous observations to help them build their hypothesis. Example: Question: If you put a glass of water outside in December, would it freeze? Previous observations: 1. Water freezes when it’s cold (below 0ᴼC). 2. It is cold outside in December. Hypothesis: The water will freeze if you put it outside in December.
Brainstorming What is a plant made of? What is a dog’s stomach made of? What is our skin made of? What is the brain made of?
Everything in the body is made different types of cells! Brain Heart Lungs Liver Stomach Intestines ?
You’re a scientist! Let’s make a hypothesis
You’re a scientist! Let’s make a hypothesis Question: What does a brain cell look like? Previous Information: What do you already know about cells? Now make a hypothesis and draw a picture.
Draw a brain cell!
How do scientists look at brain cells? MICROSCOPE
A Brain Cell Under the Microscope! https: //encrypted-tbn 1. gstatic. com/images? q=tbn: ANd 9 Gc. Sh 8 sr. OIRNImm 4 z 2 Ms 0 c. Jw. Z_w. Hu. Fh 7 AA-QE 1 Ume 7 a 6 Vu 9 BFW 1 Romw
Neurons “The Messengers” Send information to help us do everyday activities like walk, see, hear, and think 100 billion neurons in the human brain! = More Neurons than stars in the Milky Way! http: //www. fmengert. net/ http: //i 1 -news. softpedia-static. com/images/
Dendrites Neurons Axon Cell Body
Neurons send signals: – Within the brain Longest Axon – From the brain to the body – From the body to the brain
Summary • Scientists make hypotheses (your best guess) based on what they’ve seen before • Brains are made out of brain cells (neurons)
Not all brain cells look the same! Neurons Oligodendrocytes Astrocytes Microglia
Oligodendrocytes “The Wrappers” • Wrap axons with myelin – This helps signals sent by neurons move faster – Protects neurons Neuron Oligodendrocyte
Astrocytes “The Supporters” • Provide physical support and nutrients to other cells and dispose of waste
Microglia “The Protectors” • Provide defense against unwanted invaders
White vs. Grey Matter White matter – axons and oligodendrocytes Grey Matter – Neuron cell bodies
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