False because mainstream smoke is defined as smoke from a cigarette or pipe. Second hand smoke is smoke that has been inhaled by someone then exhaled, making you the "second" one to breath it :)
Interval training maximizes cardiovascular benefits, so it can quickly increase stroke volume, making your heart stronger, and more efficient. It also decreases your risk of heart disease and high blood pressure.
A vegan is someone who does not eat or use animal products.
Puberty
Hope this is correct good luck
Meninges- three layers of connective tissue
1) Dura Mater: tough top layer
2) Arachnoid Mater: middle; collagen/elastic fibers; spiderweb effect
3) Pia Mater: delicate and thin; bottom transparent layer made up of elastic/collagen fibers; blood vessels
