US Constitution the words slave or slavery do not appear in the constitution yet they are certainly referred to it.   1. The 3/5 clause which says that an enslaved person will only count as 3/5 of a person in the census. 2. ban on middle passage slave trade.
Inner side of knee. The most common cause of medial knee pain or pain on the inside part of the knee is a medial meniscal tear. The tear can be acute or degenerative but either way can cause pain and limitation of activities. Occasionally a torn meniscus can flip in and out of the joint and cause pain as well as locking of the knee.
Anterior knee pain. Knee pain felt at the front of the knee, around the kneecap, is called anterior knee pain or patellofemoral pain syndrome. It's not always obvious why this pain develops, but it's been linked to previous injuries, overuse of your knees, muscle weakness and your kneecap being slightly out of place.