Great Glands - Your Endocrine System: CrashCourse Biology #33

Hank fills us in on the endocrine system - the system of glands that produce and secrete different types of hormones directly into the bloodstream to regulate the body's growth, metabolism, and sexual development & function.

References:

Table of Contents
1) Signalling Systems 2:07:0
2) Pituitary 3:19:1
3) Hypothalamus 4:17:1
4) Thyroid 4:52:1
5) Adrenal 5:38:1
6) Pancreas 6:51:1
7) Biolography 8:49:2

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[thenightreaper]

Table of Contents
1) Signalling Systems 2:07
2) Pituitary 3:19
3) Hypothalamus 4:17
4) Thyroid 4:52
5) Adrenal 5:38
6) Pancreas 6:51
7) Biolography 8:49

[awsmrandomness]

"Sex glands come in two different flavors..." - Hank Green, accidentally making oral sex jokes since 2012.

[mulwelimushiana]

LOL, This is my first time commenting on a youtube video, I just couldnt let it go.

I watched this video out of interest, I have got to say this guy is the funniest lecturer I have never ever ever ever ever met. you too good man, I got myself watching this whole video even though I am writting an entirely whole lot different module exam tomorrow. BIG UP

[josyjos]

For all the people asking for slower talking, turn on the captions/subtitles!(the cc button) it's very helpful! I like it a lot! =)

[nickkidson]

Hank teaches me more in these 30 min lessons than my biology teacher does in 4 years

[StrongMed]

The "glands" that become swollen when sick aren't true glands in the medical sense (i.e. they aren't part of the endocrine system, nor do they secrete hormones). Swollen "glands" are actually lymph nodes, which are part of the immune system, and are responsible for producing antibodies and generally helping to coordinate the body's response to infection.

[xsjgalsabg]

my teachers literally put these videos on in class and leave.
They're getting paid for this.

[StrongMed]

Adrenaline (a.k.a. epinepherine, although many people use the term adrenaline to colloquially refer to norepinepherine as well) is not instantaneous. The instantaneous response that is felt is due to the actions of the nervous system: the central nervous system (i.e. brain), and the sympathetic and parasympathetic aspects of the peripheral nervous system are all involved. Neurotransmitters are responsible for the immediate effect, while adrenaline may take anywhere from 15-60 seconds.

[Danxoxox]

I want to make a really important distinction that wasn't made in the video. An Exocrine gland is not synonymous for "secretions outside of the body." An Exocrine gland is a gland that secretes through a duct, which yes, primarily includes secretion to the outside of the body like sweat and salivary glands, but it also includes glands that secrete inside of the gut, such as the pancreas secreting enzymes into the lumen of the small intestine. Don't let that trick question on the exam throw you off! ;)

[crashcourse]

make sure you haven't "hidden" the annotations - it's the button on the video that looks like a text box (bottom right). they should be there for everyone.

[davidscavone]

ACTH - would not actually cause the release of epinephrine; it would cause the release of adrenal cortex hormones, e.g. Cortisol and Aldestoreone. Epinephrine and norepinephrine are released from the adrenal medulla when it is innervated by the sympathetic nervous system (neural stimuli) when the body is experiencing short term stress (exercise - anxiety - shock). Which brings to the next point - Glucagon is mainly released to maintain homeostatic range of blood-glucose levels when an individual is fasting. When an individual is doing "push-ups" this triggers the short term stress response - by the sympathetic nervous - and thus the key hormones in this situation would actually be epinephrine and norepinephrine - which stimulate glycogenolysis and gluconeogenisis (amongst other things) thus increasing blood - glucose levels for muscle cells

[katbee]

I'm a nursing student, and your videos are a BIG help in reinforcing what we are learning! Love them!

[funnystuff]

Why can't hank and Vsauce be my teachers? Life would be perfect.

[tylerlenzi]

Thanks to you I got a 97% on my science exam

[skatesnlaces]

I LOVE THIS!!! Seriously I was assuming this would be part of the crash course A&P that is currently going, but getting to see Hank circa 2012 is just AWESOME.

[zeeh]

test in 13 hours and this is my first day studying FML!

[MsKerrik]

Thank you Hank, you have just managed to help me not be so terrified and overwhelmed by my physiology and anatomy exam tomorrow.  Thanks for ever!  :)  Excellent and informative clip

[roseinutube]

I hope you know that you are currently helping me SO much! These crashcourse biology videos are helping me get into a medical university I have been dreaming of going to! Things are explained so much better than any textbook i have found till now!
thank you!!!!

[emmaporter]

i wouldn't pass anything in biology without these videos, i am actually so thankful for you Hank :D

[chelsealord]

My instructor is on the ancient side and did a good, but very long drawn out explanation (while putting me to sleep) of the endocrine system. This is an AWESOME recap before an exam with some cool added info. Shared this with some friends in my class and they all agreed these vids helped them out a lot! Thank you HANK!