 Let's start with the non-living levels of organization and you have your list. So I'm going to shift us to back to slides so that we can see some images here. Oh, and it looks like I need to change the size of this just slightly. Maybe sort of a lot of size changes because I just move things around because that's fun. Okay, so let's look at, keep your list, the subatomic particles. I want you to list out who is a subatomic particle that we would include. Subatomic particles make up atoms and this is a diagrammatic view of an atom. Again, we're going to spend gobs of time talking about each of these subatomic particles because they're relevant to life, they're relevant in living systems. What we have here, you can see my little mousey mouse. We have electrons which orbit a nucleus made of protons and neutrons. This is totally diagrammatic and is just a way of helping us visualize those subatomic particles. So three subatomic particles, electrons, protons and neutrons and they make up the atoms. Now where did my atoms are? The next level of organization and atoms can be organized in a periodic chart. Atoms have labors based on the number of subatomic particles they have. So examples of atoms, oxygen, carbon, sodium, chloride, iron, did I say that one already? This list, this periodic table, again we'll look at it, you'll memorize it, just kidding you won't. It lists all the known elements that have been discovered through scientific processes. In our course, we will get really familiar with elements that are involved in life and we'll see them over and over and then we'll go like, oh yeah, we're talking about sodium, that's an atom. We're talking about oxygen, oxygen is an atom, an element, a type of atomic particle. Remember atoms can be put together like Legos to build molecules and molecules have structures and they have functions and I just because this is a molecule that is likely near and dear to many of our hearts, this is a molecule of caffeine. If you look at it carefully, you'll see a C, what is that? That represents a carbon atom. H3, what is that? That represents three hydrogen atoms. Again, we'll talk about this in grand glorious detail in probably the next couple of lectures. We get to dive right into chemistry and do stuff in lab, that'll be super fun. But it's nice to see the atoms, the way that the atoms are put together to get molecules and then go, oh yeah, I like caffeine, that seems like a good molecule to me. As we know, molecules can be used to build bigger molecules and an example of a bigger molecule is this biomolecule or a macromolecule. This is a gigantic lipid that we have here, it just says lipid. So what kind of lipid is it? We'll talk about how the lipid actually, like what this all means, these are strings of carbons and hydrogens and we'll look at those in more detail. But you can see that's a little more complicated than the caffeine molecule was. And then so you can see how we started simple with electrons and protons and neutrons. That's it. And now we're using those things to build atoms and elements and molecules and biomolecules and they're getting more and more complex. Well, when we get to the organelle level of organization, we get really complex. And this right here is an example of a ribosome. It's a totally diagrammatic view, but you can see that we've got messenger RNA interacting with this ribosome that's made out of protein and ribosomal RNA. And that that structure is like a biomolecule. It's like built from biomolecule Legos. And then it has this like wild and amazing function of building proteins in your body. Other organelles, ribosomes are an organelle. mitochondria are an organelle that exists inside your cells. The nucleus is an organelle that contains the DNA that tells the ribosome what kind of proteins to make. This is all stuff that we're going to spend a lot of time talking about. But you can see that that we've built in our structure. We've become more and more complicated. And what was the next level of organization organelles are found in cells. So then then we're in living systems. I'm going to come back to talk about those.