Controversy over Religious/Spiritual aspect
"Social science research has proven that just doing the poses and just doing yoga breathing is enough to cause spiritual transformation" - lawyer representing parents of Encinitas school district
You don't need to know anatomy to teach yoga. The requirement comes from a Western attitude of wanting to know, to dissect and analyze every posture. But anatomy is helpful in your own practice, in helping other's practice.
"Each and every joint in my body has its own freedom...I can articulate it piece by piece" - BYS Iyengar