The right ventricle pumps deoxygenated blood out of the heart through the pulmonary artery.
Blood flows from the right atrium into the right ventricle through the tricuspid valve.
The heart is located between the lungs, behind the sternum (breastbone), and to the left side of the body.
The heart is divided into four chambers, two atria (right and left) and two ventricles (right and left).
Blood flows from the right side to the left side of the heart.
Breathing is essential for life. All the cells in our body, especially our brain cells, require a constant supply of oxygen to undergo cellular respiration. When deprived of oxygen, cells can begin to die within minutes.
The respiratory system, together with the circulatory system, provides our cells with the oxygen needed for cellular respiration, while disposing of the carbon dioxide produced by this same process.
A flap of tissue called the epiglottis covers the entrance to the trachea when you swallow food or liquid to help ensure that they go into the esophagus instead
Mucus in the trachea continues to trap inhaled particles
The cilia that line the trachea sweep the mucus and dust particles back toward the pharynx where they can be swallowed or spit out
The rib cage and rib muscles are not part of the respiratory system, but they are important to its function. They work with the diaphragm to cause inhalation and exhalation. You can often observe your rib cage expanding and contracting as you breathe.
Rib cage and rib muscles
Not part of the respiratory system
Important to the function of the respiratory system
Work with the diaphragm to cause inhalation and exhalation