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🦴 There are four tiny glands sitting behind your thyroid that quietly control your calcium levels — and most people have never heard of them. They're called the parathyroid glands, and they release a hormone that does something really clever: it signals the kidneys to activate vitamin D. And here's why that matters — activated vitamin D is what allows your body to actually absorb calcium. Without it, your body can only take in a fraction of the calcium you consume. 💡 So it's a chain reaction: parathyroid hormone → activates vitamin D → vitamin D unlocks calcium absorption. Your bones are depending on all three working together. 🙌 Follow for more anatomical awesomeness! #tiktoklearningcampaign #anatomy #humananatomy #parathyroid #thyroid #calcium #vitamind #bonehealth #hormones #healthfacts #physiology #anatomyandphysiology #didyouknow #nutrition #medschool #learnontiktok

Here is the trachea, or what we refer to as the windpipe, and here above the trachea, you can see the larynx, which we nicknamed the Adam's apple....