The respiratory system is the system of organs that allow the body to take in oxygen and expel carbon dioxide, this process is known as gaseous exchange. We generally breathe between 12 and 20 times a minute.
B. Mesozoic
The Mesozoic Era is commonly referred to as the Age of Reptiles or the Age of Dinosaurs.
Because unlike nonflammable materials, wood still has the ability to burn.
Sugar molecules, cells use carbon dioxide and energy from the sun to make sugar molecules. They are moved into the sieve elements (phloem cells) through active transport. Water follows the sugar molecules into the sieve elements through osmosis (since water passively diffuses into regions of higher solute concentration).
