Questions with the keyword 'stem'

• I’ve recently seen a documentary by Dr Kevin Fong which talks about how to save a failing heart and it talks of using by hswong96 to Steve Comments: (so far, 2s comments )
• on a tree, how is the bark formed? I mean how and why is wood formed from the stem? by bouncingball8 to Charlie, Eoin, Jemma, Julian, Steve Comments: (No comments so far )