> In the human body, what does the orbital cavity contain?And the answer: eyeball. Photo credit: Getty.Also known as the eye socket, the orbit is a cavity in theskull that contains the eyeball, eyelids, cranial nerves, muscles, and more.Seven different bones make up the socket, which is shaped like a cone.The bones that comprise your head are some of the most delicate and intricate ofyour entire body. While the term "skull" is used to refer to the casing whichprotects your brain more generally, there are actually 29 bones that make upthis structure. The orbital cavity is just one piece of the puzzle. While thecavity itself is not an individual bone, its boundaries are formed by thefrontal, maxilla, zygomatic, sphenoid, ethmoid, lacrimal and palatine bones. Thecone-like shape of the orbital cavity fits between these bone structures towardsthe back of your head. You can even feel your orbital rim for yourself just tothe left and right of your eyes. Interestingly, your bones are nearly as dynamic as the organs in your body.Contrary to popular belief, bones aren't dried, immovable structures that existsimply to give your body structure. Instead, they're technically organsthemselves. Comprised of multiple types of tissue, the inner workings of bonestructures are responsible for the creation of red blood cells and storage ofcalcium. Bones are made of active connective tissue that breaks down,regenerates and repairs itself throughout your life. In fact, humans essentiallygenerate an entirely new skeleton every 7 to 10 years!As such, bones (especially those which make up the skull) can be greatlyaffected by different conditions. In 2015, astronauts Scott Kelly and MikhailKornienko spent an entire year on board the International Space Station to testthe endurance of the human body in microgravity. The pair was required toexercise extensively 6 days a week to combat the intense, weakening effects ofliving in an environment without gravity – an effect which most prominently canbe understood in relation to bone mass. In space, a human suffers 1 to 2 percentbone loss every month. That's about as much as an average elderly individualloses per year. Wow!Read more about the effects of space on bones and their associated qualities here[https://www.cnn.com/2021/04/29/health/astronaut-eye-changes-study-wellness-scn/index.html].