During inspiration, fresh air enters the respiratory system through the pared external nares (nostrils; shown here) and/or the oral cavity to the pharynx. Air then travels through the glottis into the trachea, through the bronchi and bronchioles to reach the alveoli.
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Systemic circulation which is the movement of blood through tissues of the heart carries oxygenated blood from left ventricle through arteries.
Systemic circulation moves blood between the heart and rest of body . It send oxygenated blood out to cells and return the degenerated blood to the heart.
Heart is the only organ in circulatory system organs . blood goes from heart to lung to get oxygen. lungs are the part of the respiratory system. Heart pumps oxygenated blood through artiest to the body. Systemic provide the functional blood supply to all body tissue. Oxygen locks into molecule called hemoglobin in red blood cells.
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Abstinence is the best choice because you can absolutely not get pregnant, get someone pregnant, or get an std. <span />
1. I think that the most popular conversation is about celebrities and relationships.
2. Parents have work and they have to take care of they're kids and they don't really have time.
3. I guess would be like whenever there is an event (not a fight) and when you are with friends. Also, if you want to celebrate an achievement. Basically on the weekend I guess.
4. Some people get cyberbullied and others get hacked.
