The three major types of muscle tissue differ in

Muscle tissue is categorized into three different types: skeletal, cardiac, and smooth. Each type of muscle tissue in the human body has a unique structure and a specific function. Skeletal muscle moves bones and other structures. The heart muscle contracts the heart to pump blood.

all matter is made up of atoms

in any element all atoms are the same

elements in a compound are always in a constant ratio: apex

oxygen = 21% of the atmosphere

nitrogen = 78%

carbon dioxide = 0.1%

argon =0.934%