Exousia Global Concepts

 Every minute of every day, whether you are awake or asleep, your respiratory system is working. You inhale air containing oxygen. Inside the lungs, oxygen enters the bloodstream while carbon dioxide produced by cellular metabolism moves from the blood into the lungs to be exhaled. This continuous exchange connects directly with our previous article on the heart and circulatory system. The lungs bring oxygen into contact with the blood. The heart then helps circulate oxygenated blood throughout the body. Understanding respiration therefore connects human biology, physiology, chemistry and medicine. What Is the Respiratory System? The respiratory system is the collection of organs and structures involved in ventilation and gas exchange. Its major components include: Nose and nasal cavity Pharynx Larynx Trachea Bronchi Bronchioles Lungs Alveoli Diaphragm and other respiratory muscles Together, these structures move air into and out of the lungs and provide an enormous surface for gas...

 Every second of every day, the human heart works continuously to maintain circulation. While you sleep, think, exercise or eat, blood travels through an extensive network of vessels, delivering oxygen and nutrients while carrying carbon dioxide and other metabolic products away from tissues. This remarkable transportation network is the cardiovascular system. Understanding it connects biology, physiology, medicine, biochemistry and health science. What Is the Cardiovascular System? The cardiovascular system consists primarily of three components: The heart — the muscular pump. Blood vessels — the pathways through which blood travels. Blood — the fluid transporting gases, nutrients, hormones, cells and other substances. Together, these components maintain circulation throughout the body. The heart is not simply a container filled with blood. It is a specialized muscular organ whose coordinated contractions generate pressure that moves blood through the circulatory system. The Four ...