![Um hey, Scientific American? Bird knees bend the same way as everyone else.Dr. Scott Hartman's Skeletal Drawing.com Um hey, Scientific American? Bird knees bend the same way as everyone else.Dr. Scott Hartman's Skeletal Drawing.com](https://images.squarespace-cdn.com/content/v1/51bf1cd3e4b0a897bf54112b/1371485566509-PFOTCA89UJSORRJZ2D4S/image-asset.png)
Um hey, Scientific American? Bird knees bend the same way as everyone else.Dr. Scott Hartman's Skeletal Drawing.com
![Premium Vector | Childrenes sports gymnastics. the girl is sitting in a bend position. the child pulls socks. exercises for stretching the leg muscles. vector illustration in a flat style on a Premium Vector | Childrenes sports gymnastics. the girl is sitting in a bend position. the child pulls socks. exercises for stretching the leg muscles. vector illustration in a flat style on a](https://img.freepik.com/premium-vector/childrenes-sports-gymnastics-girl-is-sitting-bend-position-child-pulls-socks-exercises-stretching-leg-muscles-vector-illustration-flat-style-white-background_505620-129.jpg)
Premium Vector | Childrenes sports gymnastics. the girl is sitting in a bend position. the child pulls socks. exercises for stretching the leg muscles. vector illustration in a flat style on a
![Increase Flexibility in Your Legs and Hips With These 30 Essential, Feel-Good Yoga Poses - POPSUGAR AustraliaPOPSUGAR Australia Increase Flexibility in Your Legs and Hips With These 30 Essential, Feel-Good Yoga Poses - POPSUGAR AustraliaPOPSUGAR Australia](https://www.popsugar.com.au/wp-content/uploads/sites/2/2021/02/2e27b7956021a6a19a0a29.34721918_-1-scaled-718x0-c-default.jpg)
Increase Flexibility in Your Legs and Hips With These 30 Essential, Feel-Good Yoga Poses - POPSUGAR AustraliaPOPSUGAR Australia
![Bend your arm at elbow. Observe the muscles in the front and the back of the arm. Straighten the arm and observe the same muscles again. Do the same with your leg Bend your arm at elbow. Observe the muscles in the front and the back of the arm. Straighten the arm and observe the same muscles again. Do the same with your leg](https://d10lpgp6xz60nq.cloudfront.net/web-thumb/647602805_web.png)