❤️🦎🆚❤️🐦🆚❤️🫀🧍

#organ comparison #heart evolution #circulatory system #internal anatomy #physiological adaptation #zoology

🧍⛰️⬆️😮‍💨✅

#altitude adjustment #mountain climbing #adaptation #breathing adjustment #high altitude training #physiological adaptation

⛰️🧗➡️😮‍💨✅

#altitude acclimatization #high altitude #mountain climbing #breathing adjustment #physiological adaptation #getting used to heights