The brain, is quite literally, the boss of your body, and the human brain is the most complex thing known to the human brain according to the human brain. We only know a tiny bit about its complexity, and this entry will cover a tiny bit of that (what did you expect, we only have two editors and the one that is in charge of this article is super lazy). Without your brain functioning, you can't breathe, move, talk, think your dirty thoughts (your brain is a book to me), solve equations, observe the world, feel emotion, not to mention your body with all the other organs would shut down. Not to mention, your brain is everything that makes you who you are, so no biggie if it disappears. The human brain is large, weighing in at 1.4 kilograms (3 pounds) and being the 3rd largest human organ. It is concentrated in water and is made of nervous tissue. The main part of the brain is split into two pieces, the brain stem, the cerebrum, and the cerebellum. The brain stem connects your brain with your spinal cord. The cerebellum looks like a walnut (don't eat one, it tastes most like brain than walnut not to mention you can barely live without one) and is used for controlling your movements, balance yourself, learn new things, judge your distance from faraway objects and the size of them, and controls your timing. Finally, the cerebrum is the most complex and the largest part of your brain, taking up 90% of the mass of your brain. It is divided into many lobes; namely, the frontal lobe, parietal lobe, occipital lobe, and temporal lobe. The frontal lobe does all the thinking and decision-making everyone consciously experiences and stores short-term memories and ide. Personally, I think this is the "brainiest" part of the brain because thinking is on the top of everyone's lists of brain functions. Next, the parietal lobe accounts for the processing of texture, smell and taste in addition with skills of your favorite elementary school subjects, starring arithmetic and reading. Furthermore, here's a quick Latin lesson; the Latin word for "eye" is "oculus", hence why we use the word "optic" to refer to things relating to our eyes. Now, you can guess what the occipital lobe does: that's right, it controls sight, and you just won our gameshow's grand finale, reward yourself with ten trillion oxygen atoms. A round of applause to this lobe for allowing you to read this right now. Lastly, the temporal lobe works with our ears and picks up sound data and helps to create and recall memories. As a correction and addition of the prior information, the brain is split into two hemispheres, so when I say "lobe", I mean "lobes" because technically there is two parts of each lobe in each hemisphere.
Some other important parts of their brain and their respective functions are
Hippocampus: This is where all the young hippopotami that live in your brain live when they crave knowledge for your memories, retrieves memories, and helps send them to their respective locations. Essentially, this tiny seahorse-shaped part of your brain is the key player in managing and storing your memories. Most importantly, the guy who named this should be fired.
Motor cortex: This part is located behind the frontal lobe, and as its name suggests, it is responsible for motor functions and voluntary movement.
Hypothalamus: Like the hippocampus, this is yet another tiny part but important part, and the hypothalamus is responsible for waking you up, commanding the flow of adrenaline, and controlling chemicals that at catalysts of emotions.
Thalamus: Above the hypothalamus (another lesson on roots: "hypo" means under, and brain maps confirm it!) is the thalamus. The thalamus is like a border for information between the spinal cord and the cerebrum.
As previously stated, the brain is made out of nervous tissue, one of four (there's connective which connects things and helps our body maintain shape, epithelial which protects our organs, muscle which moves bones which helps our body move, and nervous tissue). Nervous tissue is made out of a special type of cell called the neuron, which by the way, I have 1 left in my brain, looks like an invading alien species (a picture is at the top of the page to the left, it's that purple-pink thing) and works by chaining to others and spreading signals. In each cell, there are multiple dendrites (far left in the diagram) that function as ports that receive signals from other neurons connected to the cell body that contains the cell's nucleus. Next is the axon, a long tail-like structure extending from the cell body that is covered in multiple myelin sheaths that look like white pills. After that, there are branches that connect to other neurons' dendrites in places called "synapses". These connections are responsible for your skills and memories. As you grow and learn new things, the neurons in your brain form more connections, and as you master the skills that need certain connections, the connection get stronger and faster, just like a narrow old dirt road slowly being transformed into a multi-lane superhighway, which is why people way "practice makes perfect". These cells form your nervous tissue which forms your brain that is in charge of everything you know and every bit of personality of you and all your senses and moves your body. Nice. The super-developed super-complex supercomputer brain is still crippled by the dopy boi dopamine though.
Sources
ninds.gov www.ninds.nih.gov/health-information/public-education/brain-basics/brain-basics-know-your-brain
Cleveland clinic my.clevelandclinic.org/health/body/23418-cerebellum