It's not nervousness; constant scanning is a crucial adaptation. We explain how fixed anatomy drives head movement for vigilance and resource location.
Clarify the chemistry: We define Methylchloroisothiazolinone (MCI) and silicones, explaining their structural differences and why their functions matter for product safety.
Get the definitive anatomical answer about lymph nodes near the shoulder. Explore their immune function and the meaning behind any changes or swelling.