Cardiovascular System Essay

The cardiovascular system is the movement of blood being permitted around the body to vital organs and muscles with the components of the heart, blood, and blood vessels combining together to make the cardiovascular system work. The cardiovascular systems is vital in the human body as it promotes the body's delivery system for blood being pumped around the entire body for survival. The respiratory system also has importance in the body as it is the system to transport air into the lungs to aid the diffusion of oxygen to the blood.The primary functions of the cardiovascular and respiratory systems is to provide the body with nutrients and oxygen and get rid of waste products such as carbon dioxide. During short term exercise stimulus there is a significant change in heart rate, blood pressure and respiratory rate as it adapts to the short term exercise stimulus. The body responds to the change in activity levels in order to maintain a constant internal environment. The heart during exercise
The mechanical act of air moving in and out of the lungs is known as pulmonary ventilation. Air is breathed in through the mouth where it then travels through the windpipe into the lungs. In the lungs there are small sacs that capture the oxygen and distribute it into the bloodstream through the capillaries. Breathing rate increases during exercise which enables more air to move in and out of the lungs , which enhances gas exchange. The intercostal muscles and diaphragm aid the expansion of the thoracic cavity to improve the ability to breathe in more air. During inhalation the aveolar pressure decreases whilst the intrapleular pressure increases, the diaphragm contracts taking in an increased amount of air. The body then exhales out carbon dioxide, whereby alveolar pressure increases and the intrapleular pressure increases, the diaphragm