Anatomy of a neuron | Human anatomy and physiology | Health & Medicine | Khan Academy

Neurons (or nerve cells) are specialized cells that transmit and receive electrical signals in the body. Neurons are composed of three main parts: dendrites, a cell body, and an axon. Signals are received through the dendrites, travel to the cell body, and continue down the axon until they reach the synapse (the communication point between two neurons). Created by Sal Khan.

Health & Medicine on Khan Academy: No organ quite symbolizes love like the heart. One reason may be that your heart helps you live, by moving ~5 liters (1.3 gallons) of blood through almost 100,000 kilometers (62,000 miles) of blood vessels every single minute! It has to do this all day, everyday, without ever taking a vacation! Now that is true love. Learn about how the heart works, how blood flows through the heart, where the blood goes after it leaves the heart, and what your heart is doing when it makes the sound “Lub Dub.”

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[TheCrazyMango]

"Let me pick a better color" *continues to use the exact same shade of yellow*

[OhHelloLovely]

R u sure it isn't just ur neurons telling u that they're the coolest cell??

[jefferyz]

I believe my Biology book is trying to make everything complicated, so the author can be seen as an intellectual. Students in introductory courses would learn much better with straight-forward teaching, like here. Thank you Salman!

[ElCholoDeJolo]

Gandalf-
Quickly Hobbits, we must now cross the Sheaths of Myelin and down into the Nodes of Ranvier. For therein resides the Lady of the Neurofilimantes, whose control of the Schwann we require.

[poqbum]

The end of this video seems like it was cut off early :'(

[sofiavaiopoulou]

It seems so simple comparing with the university books!!!Thank you!!!

[Dessyy]

thanks so much for this! im a visual learner and lectures are not very visual, this has helped me understand so much!

[dimitrahnk]

It should be noted that upon talking about the anatomy, one should distinguish between the CNS (Central Nervous System) and the PNS (Peripheral Nervous System), since the CNS has the oligodendrocytes as an insulator wrapped around the axon, whereas the PNS has the Schwann cells. They both do more or less the same job, yet the structure is different. Of utmost importance is the fact that the Schwann cells are the only ones capable of axonal regeneration after damage in mammals, which explains why such process is only feasible on the PNS.

[YNWAstyle]

"Anatomy of a neuron" imo is a too broad term to deal with. There is a variety of neurons in the different parts of the CNS and PNS with differing morphological characteristics. Nevertheless, a very good basic explanation.

[namaanda]

I wonder if I can be a neuroscientist with hundreds maybe thousands of this kind of video (maybe with some research paper too), instead of attending university class. I'm a language literature student btw. But I'm willing to learn about cosmos.

[robertwc]

im a complete layman when it comes to neuroscience or even cell biology (i have no formal education, didnt pass highschool lol) but all i want to know is, what physical properties determines how much input voltage turns the neuron "on". is it the ratio of positive ion gates, to negative ones? like, what sets the neuron's weight value?

[tfburns]

A myelin sheath is an 'outgrowth' of schwann cells in the peripheral nervous system (PNS) ONLY and can only provide a segment of myelin sheath around a single axon whereas in the central nervous system (CNS) myelin sheath is provided by oligodendrocytes, which can provide myelin sheath around many axons (up to 40 or 50). Additionally there are neurons without a myelin sheath. (Oligodendrocytes and schwann cells are types of glial cells).

[conniecarty]

Thank you for you amazing videos. I am also a teacher. What format/program are you using for these videos? Connie
Does anyone else know?

[HafizahHoshni]

Thanks. You are awesome tutor ever !!! XD

[melirose]

Thank you so much!!! You explained this better than my anatomy teacher, who drives me crazy because she can't teach for crap. I like the way you simplified it =0)

[herrschultz]

Wow, my bio teacher compares nothing to this channel. Oh my goodness. The videos are extremely helpful.

[booradleyhaha]

thank you so much i used this video to help study for my psychology test next period :]
-highschool senior current A in psych

[vampy]

THIS is such a good way of revising. I revise better with colours and diagrams and this was awesome, thank you!

[wisdomteeth]

Lovely drawings and captivating voice
i loved and understood the video 
Thank you much
long live khan academy<3

[adriadam]

your video's saved me... writing a biology test today and this was amazingly helpful