Peter Oliveira

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Bone anatomy

Adults have between 206 and 213 bones. You use all of them each day to sit, stand and move. Some bones protect your internal organs. For example, your skull safely encloses your brain, and your ribcage shields your heart, lungs and other organs near your chest. Bones are usually self-sufficient at maintaining themselves, but health conditions like osteoporosis can make you more likely to break bones or have other complications.

Muscle anatomy

There are three types of muscle tissue in your body:
Skeletal muscles are part of your musculoskeletal system. They work with your bones, tendons and ligaments.
Cardiac muscle (myocardium) makes up the middle layers of your heart. It doesn’t exist anywhere else in your body. Cardiac muscle squeezes and relaxes to pump blood through your cardiovascular system.
Smooth muscles are involuntary muscles that line the inside of some organs. They do essential jobs like moving waste through your intestines and helping your lungs expand when you breathe.

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