patella 膝蓋骨(しつがいこつ)

patella 膝蓋骨(しつがいこつ) = knee cap 膝頭（ひざがしら）patella は医学用語、knee cap は一般用語。2:16 and the patella? it's right there. tell me about the patella. babies are born without knee caps. isn't that crazy? 膝蓋骨(しつがいこつ)はどこにあるの？ここ。膝蓋骨について説明してください。生まれたての赤ちゃんにはこの骨はついていません。おかしいですね。

Brielle Teaches Ellen About the Human Body

https://www.youtube.com/watch?v=5DuNlUhpOEY  5:20 just a few minutes ago, my patella was right here. さっきで、膝頭はずれてここにあったの。
Epic Grand Canyon Hike: Frozen Shoes and Low on Food (Part 2) | National Geographic

https://www.youtube.com/watch?v=rWJqOLXVdQ8  2:02 we can look at that and his patellar reflex. 膝蓋反射、膝蓋腱反射、膝の反射
RMR: Rick with Resident Doctors