2/100: Anatomy and physiology of the human body

[melluransa]

I really love the human body. I love the systems and all the things they do and how they work together. I love how every blood vessel is named and graphed, now each bone and cartilage is mapped out and has its specific range of motion, how every nerve branched is named and innervates some particular structure. I love the muscles, and how they all work collectively to make you move, when really each muscle is a bundle of fibers that contracts but pushes and pulls against your skeleton. Each component is so simple and restricted, but everything together results into the mindblowing complexity of movement we can achieve with our hands, faces, eyes, feet, tongue, and larynx. I love that the body heals itself, and how it's constantly producing new cells and getting rid of old ones. I love how the lungs exchange molecules floating in the air into and out of your blood, incredibly efficiently and how the oxygen-replenished blood circulates through your body to where you need it. I love how an embryo develops from one cell to a layered plate thing, with the different layers of cells eventually differentiating and moving and becoming all the different things in your body, all in the first trimester. I love that we experience the world through our senses, and how those senses are tied to specific structures, neural pathways, brain regions... and then how we perceive that. I love that I'm lucky enough to study the anatomy and physiology of the human body.

I'm totally making a separate post about the brain one day. The brain deserves its own post.