It’s living vs non living
Signal your body to prepare for repeated contractions
Get your muscles ready for usage and widen up
Sends more blood in your body everwhere to be used over and over again for respiration
( pls mark this brainliest i need a new rank )
Answer:
Because different countries have different languages and call the species different things
Explanation:
Answer:
The most important are the lungs, more precisely the alveoli.
Explanation:
Alveoli are structures of the lungs where gas exchange occurs. They allow oxygen from the air to pass into blood. Oxygen diffuses through the walls of alveoli into the capillaries that surround it. Oxygen is then bonded with the iron in red blood cells and travels to the heart. The heart then sends the oxygenated blood out to all the cells in the body.