'When you "make a muscle" in your arm, you contract this 2-headed muscle'
Bicep
B IN BIOLOGY: When you make a muscle in your arm, you contract this 2-headed muscle
When you "make a muscle" in your arm, you contract this 2-headed muscle
When you "make a muscle" in your arm, you contract this 2-headed muscle
"B" IN BIOLOGY
Bicep
"B" IN BIOLOGY