 Hey everybody, Dr. O here. In these two videos, we're going to do a quick preview of all 11 organ systems. Now the first thing you might notice is there are 12 systems on the screen here and that's because we're going to separate the male and female reproductive systems because they're so different. So we're going to go through each one but I'm not going to split it up six and six. I'm going to cover the first four organ systems that we cover in AMP1 and then I'll cover all the remaining organ systems in part two of the video which will be covered in AMP2. I still want you to watch it in AMP1 but I'll bring it back in AMP2 for you as well. So let's go ahead and dive in and take a look at them. So once we've covered atoms and molecules and put them together, you know, to form organelles and cells and then we put our cells together to form tissues. After we're done with those first few chapters, then we will dive in to the organ systems and from there all the way to the end of AMP2 we'll always be focusing on one organ system at a time. The first one is the integumentary system. So it's the skin and all the accessory structures. You see the skin, hair, nails. What it says here, it encloses internal body structure. So obviously it is a barrier. Your skin is a barrier. It keeps things out primarily pathogens. That's why so it is part of your immune system. If you want to look at it that way, because if you have a cut or a hole in your body from surgery or maybe a burn, things like that, then it's way easier to get infectious diseases because they now have a new portal into your body. So it is a barrier as far as keeping things out but it also keeps things in, primarily water. So skin is very important to keep all your water from leaving your body. You'll see the skin also is linked to your nervous system because of all of the mechanoreceptors, thermoreceptors, those types of things. Another big thing that your skin does though, your skin works with your blood like a radiator system to help regulate body temperature. So if it's hot, your warm blood rushes to your skin so that evaporation and radiation can take heat away. If it's cold, your warm blood rushes away from your skin to keep your core temperature elevated. So that's just a quick intro to the integumentary system. Next, we have the skeletal system. You probably think structure, support without a skeletal system. You just be a blob on the ground, right? So the skeletal system, very important for protection like my ribcage and sternum, protecting my heart and support. But also very important for movement with your muscular system. Muscles, your origin and insertion of your muscles is on your skeleton so that it can move your body. So it works with the muscular system for movement. It's not primarily responsible for it. Other things it does, consider your bones, a mineral storage depot. This will be where 99% of your body's calcium is. Most of your minerals, this is where they're stored. So your body puts them in your bones when you have an excess, pulls them from your bones when you need them. We'll cover that in great detail. Lastly, the one people forget is your skeletal system is involved in blood cell formation because inside your bone is bone marrow. And that's going to be where your stem cells that make new blood cells are going to be. That's your skeletal system. Muscular system, we just talked about it obviously with movement. The job of muscles is to contract. And when muscles contract, they pull bones closer together or farther apart. And that's how your muscles allow movement with your skeletal system. If it weren't for your bones, your muscles couldn't do much but twitch because they need to have something to pull on. Then you see there it says, helps maintain body temperature. How it does that is it generates body heat. Your muscles are very metabolically active. So a lot of your body heat comes from muscle. That's why if you're cold, you will shiver or your muscles will increase their tone because they'll generate more heat because of that. So that's probably the one that students forget the most movement makes sense. But also your muscles are involved in protection too. Look at like the core there where you don't have a rib cage. Your abdominal muscles and fat would be the primary thing protecting those areas. So protection, movement, and generating body heat. Whereas your skin was regulating body heat. Nervous system, last one here in AMP2. We'll cover this over like five chapters. So it says here, it's your brain and spinal cord is your central nervous system and then you're going to have your peripheral nerves plus everything connected to them, detects and processes sensory information. So all the information traveling towards your brain and spinal cord would be sensory information telling your body what's going on. Whether it's what you see, what you hear, what you feel, these types of things. And then activates bodily responses. So your brain then sends information down the spinal cord to your nerves to respond. So if you touch something hot, you're going to pull your hand away. So the touching something hot was a sensory response that we withdrawing and pulling away would be a motor response. That would be an example of a reflex. So some of it's conscious and some of it's subconscious. Nervous system also, another key thing to remember is your nervous system, along with the first system we're going to cover in AMP2, the endocrine system, are the two systems primarily responsible for maintaining homeostasis, a stable internal environment. Your nervous system is responsible for short-term control of homeostasis and keeping you alive. Because the responses of your nervous system are very quick. They can happen in milliseconds, but they're very short-lived. So if you need short, quick responses to keep you alive and keep your body stable, your nervous system will do it. As you'll see in the next video, the endocrine system controls things that take a long time. So it keeps you alive, think growth, development, these types of things. Metabolism. Okay, so those are the organ systems that we will cover in AMP1. I hope this helped. Have a wonderful day, be blessed.