Alright, now we're going to compare these two systems that sometimes overlap.
And a lot of people have a big misconception of the two.
You have exocrine system and you have the endocrine system.
So, what's the difference between the two?
Number one is that the endocrine system makes hormones.
So, chemical messengers that are transported through the blood.
Versus exocrine systems do not make hormones.
They just make secretions, so non-hormones.
I'll explain later what I mean by that.
Non-hormones. So, what else do they do?
The difference between the two is endocrine system -- as I mentioned before -- is a ductless system.
So, I'll put this in quotes: ductless system. Right?
So, rather than having ducts, this has hormones. Right?
So, it's a ductless system, meaning that as soon as the hormones are produced
in the endocrine system, they're secreted directly into the blood.
Alright? And so they're not really stored in any real ducts.
Vice versa, exocrine system is a duct system. Right?
So, whatever those non-hormone secretions are -- so, any kind of fluid: sweat, tears, um...what else?
Oils, milk production -- all of those are actually stored in these ducts
and need to be stimulated in order to cause some kind of release.
Alright? So, duct vs. ductless.
So, exocrine is a duct system and endocrine is a ductless system.
Alright? Let's look at examples now. So, I mentioned a couple of the examples.
So, the exocrine system -- so, the sweat glands, or the sudoriferous glands.
Right? So, you have the sudoriferous or sweat glands.
You have the oil glands -- the sebaceous -- these are all examples. Let's put a "Ex." here.
Sebaceous -- so, what is sebaceous? These are the oil glands. Right?
So, you have lacrimal glands, so tear glands.
You know, you have milk glands, so the mammary glands for production of milk.
So, whenever milk is produced with the hormone that's secreted from the anterior pituitary prolactant,
the mammary glands begin a storage reservoir for all the milk. Alright?
Endocrine gland is all the glands of the endocrine system. Right?
So, they have [inaudible] ducts. So, if we start from the brain,
we can look at the hypothalamus, the pituitary -- Right? So, hypothalamus.
The pituitary glands, anterior or posterior, either/or.
Uh...pituitary. Right?
You have, for example, the thyroid gland. For example, you have the adrenal gland, etc.
Right? So, there's a lot of endocrine glands here.
So, the difference again is between these two phenomena.
One secretes hormones -- endocrine secretes hormones, exocrine secretes non-hormones, secretions like fluids.
Endocrine is a ductless, meaning that every single hormone that's created is secreted directly into your blood.
Versus exocrine is a duct system where all the fluids that are created are stored in these duct networks.
And that's the comparison between the endocrine system and the exocrine system.