WEBVTT 00:00:08.187 --> 00:00:12.655 Alright, now we're going to compare these two systems that sometimes overlap. 00:00:12.655 --> 00:00:16.373 And a lot of people have a big misconception of the two. 00:00:16.373 --> 00:00:19.575 You have exocrine system and you have the endocrine system. 00:00:19.575 --> 00:00:21.427 So, what's the difference between the two? 00:00:21.427 --> 00:00:26.444 Number one is that the endocrine system makes hormones. 00:00:28.710 --> 00:00:32.398 So, chemical messengers that are transported through the blood. 00:00:32.398 --> 00:00:35.535 Versus exocrine systems do not make hormones. 00:00:35.535 --> 00:00:39.049 They just make secretions, so non-hormones. 00:00:39.366 --> 00:00:42.517 I'll explain later what I mean by that. 00:00:42.817 --> 00:00:45.734 Non-hormones. So, what else do they do? 00:00:45.734 --> 00:00:51.769 The difference between the two is endocrine system -- as I mentioned before -- is a ductless system. 00:00:51.769 --> 00:00:57.055 So, I'll put this in quotes: ductless system. Right? 00:00:57.055 --> 00:00:59.739 So, rather than having ducts, this has hormones. Right? 00:00:59.739 --> 00:01:04.826 So, it's a ductless system, meaning that as soon as the hormones are produced 00:01:04.826 --> 00:01:08.327 in the endocrine system, they're secreted directly into the blood. 00:01:08.327 --> 00:01:11.510 Alright? And so they're not really stored in any real ducts. 00:01:11.510 --> 00:01:17.229 Vice versa, exocrine system is a duct system. Right? 00:01:17.580 --> 00:01:25.967 So, whatever those non-hormone secretions are -- so, any kind of fluid: sweat, tears, um...what else? 00:01:25.967 --> 00:01:31.353 Oils, milk production -- all of those are actually stored in these ducts 00:01:31.353 --> 00:01:37.686 and need to be stimulated in order to cause some kind of release. 00:01:37.686 --> 00:01:40.555 Alright? So, duct vs. ductless. 00:01:40.555 --> 00:01:44.255 So, exocrine is a duct system and endocrine is a ductless system. 00:01:44.255 --> 00:01:48.343 Alright? Let's look at examples now. So, I mentioned a couple of the examples. 00:01:48.343 --> 00:01:54.211 So, the exocrine system -- so, the sweat glands, or the sudoriferous glands. 00:01:55.496 --> 00:01:58.447 Right? So, you have the sudoriferous or sweat glands. 00:01:58.447 --> 00:02:04.364 You have the oil glands -- the sebaceous -- these are all examples. Let's put a "Ex." here. 00:02:04.364 --> 00:02:09.451 Sebaceous -- so, what is sebaceous? These are the oil glands. Right? 00:02:09.451 --> 00:02:13.453 So, you have lacrimal glands, so tear glands. 00:02:14.787 --> 00:02:20.787 You know, you have milk glands, so the mammary glands for production of milk. 00:02:22.954 --> 00:02:28.223 So, whenever milk is produced with the hormone that's secreted from the anterior pituitary prolactant, 00:02:28.223 --> 00:02:34.076 the mammary glands begin a storage reservoir for all the milk. Alright? 00:02:34.076 --> 00:02:38.279 Endocrine gland is all the glands of the endocrine system. Right? 00:02:38.279 --> 00:02:41.195 So, they have [inaudible] ducts. So, if we start from the brain, 00:02:41.195 --> 00:02:46.099 we can look at the hypothalamus, the pituitary -- Right? So, hypothalamus. 00:02:46.498 --> 00:02:51.132 The pituitary glands, anterior or posterior, either/or. 00:02:52.035 --> 00:02:54.517 Uh...pituitary. Right? 00:02:54.948 --> 00:03:03.685 You have, for example, the thyroid gland. For example, you have the adrenal gland, etc. 00:03:04.354 --> 00:03:09.488 Right? So, there's a lot of endocrine glands here. 00:03:09.488 --> 00:03:12.791 So, the difference again is between these two phenomena. 00:03:12.791 --> 00:03:19.543 One secretes hormones -- endocrine secretes hormones, exocrine secretes non-hormones, secretions like fluids. 00:03:19.543 --> 00:03:27.079 Endocrine is a ductless, meaning that every single hormone that's created is secreted directly into your blood. 00:03:27.079 --> 00:03:33.599 Versus exocrine is a duct system where all the fluids that are created are stored in these duct networks. 00:03:33.599 --> 00:03:37.384 And that's the comparison between the endocrine system and the exocrine system.