Institute of Human Anatomy

Estrogen helps determine when you stop getting taller. In men too. It helps close growth plates and keeps osteoclasts, the cells that break down bone, in check. When estrogen levels drop during menopause, bone loss speeds up. Follow us for more human anatomy.

A 2-month-old baby boy can have testosterone levels close to an adult man’s. So why no baby beard? 👀 That testosterone surge is temporary. By around 6 months, it’s mostly faded. And a baby’s tissues don’t respond to testosterone the same way they will during puberty. It’s called mini-puberty, and we break it down in our brand new video. Follow us for more anatomy!

IOHA is now on Spotify! 🥳 🫀Check out our Podcast and give us a follow! 👇 #podcast #spotify #IOHA #learn open.spotify.com/show/033k2a…

🫀 Your blood doesn't just travel through your body — it makes deliveries at every stop along the way. And that exchange system? It's at the center of how your body adapts to exercise. Stay tuned. 👀 Follow for more anatomical awesomeness! #anatomy #humananatomy #bloodvessels #capillaries #arteries #femoralArtery #circulatorysystem #hearthealth #exercisescience #physiology #anatomyandphysiology #fitness #sportsscience #medschool #premed #learnontiktok

💪 Your bicep is made up of thousands of string-like cells — and not all of them work the same way. 🧬 Stay tuned — this is where the muscle growth story gets interesting. Follow for more anatomical awesomeness! #anatomy #humananatomy #muscleanatomy #musclefibers #biceps #fasttwitch #slowtwitch #exercisescience #physiology #anatomyandphysiology #fitness #strengthtraining #musclegrowth #sportsscience #medschool #learnontiktok

🫀 Your body has its own built-in detox system — and it's far more sophisticated than any juice cleanse. The liver is your body's chemical processing plant. Follow for more anatomical awesomeness! #anatomy #humananatomy #liver #detox #hepatocytes #firstpassmetabolism #physiology #anatomyandphysiology #biology #medschool #premed #nursingschool #healthscience #didyouknow #sciencefacts #learnontiktok

⚡ Your body's fight-or-flight response is one of the most powerful physiological events that can happen inside you — here's what's actually going on. Your body doesn't just react to danger — it transforms for it. 🧠 Follow for more anatomical awesomeness! #anatomy #humananatomy #nervoussystem #fightorflight #sympatheticnervoussystem #adrenaline #epinephrine #adrenalgland #physiology #anatomyandphysiology #stressresponse #biology #medschool #premed #nursingschool #learnontiktok

🏋️ Strength, endurance, and muscle size — they're not the same thing. Here's the difference. But training specifically for one doesn't automatically give you the others — your program needs to match your goal. 🎯 Follow for more anatomical awesomeness! #anatomy #humananatomy #muscleanatomy #strength #hypertrophy #muscularendurance #exercisescience #physiology #anatomyandphysiology #fitness #strengthtraining #sportsscience #quads #musclefibers #medschool #learnontiktok

⚠️ If you think someone is having a stroke, remember FAST — it could save their life. Follow for more anatomical awesomeness! #anatomy #humananatomy #brain #stroke #strokeawareness #FAST #brainhealth #ischemicstroke #hemorrhagicstroke #neuroscience #bloodpressure #cardiovascularhealth #physiology #anatomyandphysiology #medschool #learnontiktok

🧠 There's a window of time after a stroke where brain tissue can still be saved — here's how it works.🫀 Follow for more anatomical awesomeness! #anatomy #humananatomy #brain #stroke #ischemicstroke #ischemia #penumbra #neuroscience #middlecerebralartery #atherosclerosis #atrialfibrillation #AFib #brainfacts #physiology #anatomyandphysiology #learnontiktok

💪 Why are powerlifters often stronger than bodybuilders — even with less muscle mass? It comes down to your nervous system. Training your nervous system to recruit more motor units, more efficiently, is how you get stronger without getting bigger. 🧠⚡ Follow for more anatomical awesomeness! #anatomy #humananatomy #muscleanatomy #neuroscience #strengthtraining #powerlifting #motorneuron #nervoussystem #exercisescience #physiology #anatomyandphysiology #fitness #sportsscience #medschool #premed #learnontiktok

🧠 Brain cells start dying within 4–6 minutes of a stroke. Here's what's actually happening inside. A stroke occurs when blood flow to part of the brain is disrupted — starving neurons of oxygen and nutrients. Follow for more anatomical awesomeness! #anatomy #humananatomy #brain #stroke #ischemicstroke #neuroscience #brainfacts #carotidArtery #bloodclot #medicalfacts #physiology #anatomyandphysiology #medschool #premed #nursingschool #learnontiktok

🔬 What's actually a healthy body fat percentage — and how do you know if yours is putting you at risk? Follow for more anatomical awesomeness! #anatomy #humananatomy #adiposetissue #bodyfat #bodycomposition #healthmarkers #fatloss #metabolichealth #visceralfat #calorideficit #physiology #anatomyandphysiology #health #medschool #premed #learnontiktok

🧠 There's a gland the size of a pea at the base of your brain — and it determines how tall you grow. Too much during the growth years? A person could reach up to 8 feet tall — a condition known as gigantism. 📏 Follow for more anatomical awesomeness! #anatomy #humananatomy #brain #pituitarygland #growthhormone #hormones #endocrinesystem #bonemass #gigantism #growth #physiology #anatomyandphysiology #medschool #premed #nursingschool #learnontiktok

⚠️ Excess fat doesn't just affect your heart — it can disrupt nearly every system in your body. Follow for more anatomical awesomeness! #anatomy #humananatomy #adiposetissue #visceralfat #metabolicsyndrome #heartdisease #fattyliverdisease #inflammation #hormonehealth #type2diabetes #physiology #anatomyandphysiology #medschool #premed #healthscience #learnontiktok

🫁 VO2 max isn't just a fitness buzzword — here's what's actually happening inside your body. Follow for more anatomical awesomeness! #VO2max #anatomy #humananatomy #respiratorysystem #exercisescience #physiology #anatomyandphysiology #alveoli #oxygen #lungs #medschool #premed #nursingschool #sportsscience #biology #learnontiktok

🫀 Fat isn't just stored energy — and too much of it affects nearly every system in your body. These aren't isolated problems — they're the starting point for some serious conditions we'll break down in parts 2 and 3. 👀 Follow for more anatomical awesomeness! #anatomy #humananatomy #adiposetissue #visceralfat #fatloss #bodycomposition #inflammation #hormones #hearthealth #physiology #anatomyandphysiology #health #healthscience #medschool #premed #learnontiktok

🧠 This tiny gland at the base of your brain controls how you grow, recover, and even how you sleep. That's why quality sleep isn't just rest — it's recovery at a hormonal level. Follow for more anatomical awesomeness! #anatomy #humananatomy #brain #pituitarygland #hypothalamus #growthhormone #hormones #endocrine #endocrinesystem #sleep #circadianrhythm #physiology #anatomyandphysiology #medschool #premed #nursingschool #learnontiktok

🫁 Want to improve your VO2 max? Here's exactly how to train for it. 💪 Follow for more anatomical awesomeness! #VO2max #cardiotraining #exercisescience #humananatomy #anatomy #physiology #anatomyandphysiology #fitness #zone2training #heartrate #endurance #sportsscience #medschool #premed #healthscience #learnontiktok

If you spot a stroke happening, the acronym FAST could save someone's life. 🧠 Follow for more anatomical awesomeness! 👉 #anatomy #humanbody #stroke #strokeawareness #brainhealth #fast #humananatomy #neuroscience #cardiovascular #bodyscience #anatomyeducation #didyouknow #learnontiktok