The Heart and Circulation of Blood

As blood travels through the circulatory system, it is first pumped from the right side of the heart to the lungs through the pulmonary arteries and then separates into arterioles which split into capillaries. Here, the deoxygenated

The circulatory system and the respiratory system work closely together to ensure that organ tissues and systems receive enough oxygen. Oxygen is required for cellular functions such as cell respiration. This is so the body’s organs and cells can work at fully; it is done by releasing chemical energy with in stored foods. The air breathed in and held in the lungs is transferred to the blood. The blood is circulated by the heart, which pumps the oxygenated blood from the lungs to the body organs and returns with deoxygenated blood.

 Once the blood cell gets to the superior vena cava it goes through the right atrium and the right ventricle, then through the pulmonary artery and into the lungs.

The right atrium is where the process begins. Then, blood travels through the tricuspid valve to the right ventricle, and from there to the pulmonary artery. Once the blood travels through the pulmonary artery, it reaches the lungs. While in the lungs, the blood goes through a gas exchange: deoxygenated blood gets oxygenated (The gas exchange takes place in the alveoli, which are tiny air sacs in the bottom of the lungs

Functioning as a rapid delivery system, bringing molecules of nutrients and oxygen to each cell, and enabling the diffusion process are the roles of the circulatory system. Through blood vessels, moved by the internal pump, the heart, blood carries molecules of nutrients and oxygen. In both systemic and pulmonary circuits, veins move blood towards the heart, while arteries transport blood away from the heart. Also entitled the blood circulatory system, the cardiovascular system

Once deoxygenated blood enters the right atrium, it travels through the tricuspid valve into the right ventricle. Then the blood goes through the pulmonary semilunar valve into the pulmonary arteries. Once in the pulmonary arteries the blood is pumped into the lungs where it is then oxygenated. The blood goes from the lungs through the pulmonary vein into the left atrium. From there it passes through the bicuspid valve into the left ventricle where it is then pumped out through the aortic semilunar valve into the aorta (Drake 101). From the aorta the blood goes to the right and left coronary arteries.

Next stop. Right atrium. One of the four chambers of the heart, the right atrium lets deoxygenated blood to pass through the tricuspid valve into the right ventricle and from there to the lung to oxygenate. The tricuspid valve, also known as right atrioventricular valve is located between the two chambers and it looks like flaps that blocks blood flowing back into the atrium. (Yahoo Health, 2013) The right ventricle of the heart has the mission to pump the blood into the pulmonary artery via the pulmonary valve and pulmonary trunk right into the lungs. Ready to go through the pulmonary valve into the pulmonary artery? Here we go! Weeeee…..

Blood comes from the Superior and Inferior vena cava, into the right atrium. As the right atrium fills with blood, it contracts and the tricuspid valve opens and the blood pumps into the valve. When the right ventricle is full the tricuspid valve close to ensure blood moves in the right direction. The blood then moves to the right ventricle and into another valve called the Pulmonary valve. Then moves to the pulmonary artery and into the lungs. The blood moves into the lungs and picks up fresh oxygen. Then it returns to the left heart through the pulmonary veins to the left atrium. It passes through the mitral valve and enters the left ventricle. Oxygenated blood moves into the aortic valve and into the Aorta to reach all parts of the body ( heart.org).

Did you know the circulatory system comprises the heart, veins, capillaries and arteries? The system moves pure oxygenated blood in a continuous and controlled way from the lungs and heart so that blood can reaches every cell. Blood travels through a type of network of vessels that include capillaries that permeate every tissue of the body. Once it’s depleted of oxygen, the blood returns to the lungs and heart and the cycle continues.

has to work harder pumping blood to the rest of the body. Blood in our

At the lungs and in the alveoli, the red blood cell has picked up the oxygen it needs to carry. This oxygenated blood is sent back to the heart.

Once the blood is oxygenated the blood enter the heart through the pulmonary vein into the left atrium, the oxygenated blood is pumped to the next chamber through the mitral valve to the left ventricle.

Veins, arteries and capillaries are the delivery routes of the heart which allow blood to be distributed to the body and organs. Moreover, where gas exchange takes place. Arteries carry oxygenated blood away from the heart to the systemic circulation and deliver oxygen-rich blood to the body whereas veins carry de-oxygenated blood from capillary beds towards the heart to get oxygenated (Marieb & Hoehn, 2013). For gas exchange the capillaries are in the lungs. Gas exchange occurs when O2 from the lungs to the bloodstream via the capillaries; at the same time CO2 passes from the bloodstream to the lungs. The Capillaries are located in the lungs within the muscles. Capillaries transport oxygen through its walls and diffuse into the tissue.

The cardiovascular system is responsible for transporting oxygen, nutrients, hormones, and cellular waste products all throughout the body. The cardiovascular systems main power is the heart. There are two main circulatory loops in the human body. The pulmonary circulation loop and the systemic circulation loop. The pulmonary circulation moves deoxygenated blood from the right side of the heart to the lungs, where the blood picks up oxygen and returns to the left side of the heart. The pumping chambers of the heart that support the pulmonary circulation loop are the right atrium and right ventricle. The systemic circulation brings very high oxygenated blood from the left side of the heart to all of the tissues of the body, except for the heart and lungs. Systemic circulation removes wastes from body tissues and returns deoxygenated blood to the right side of the heart. The left atrium and left ventricle of the heart are the pumping chambers for the systemic circulation

The heart’s circulatory system of a frog consists of three chambers, the left and right atrium, and a ventricle. The right atrium receives deoxygenated blood from the body, and the left atrium receives oxygenated blood from the lungs and skin. Both atria then go through a ventricle that does not allow the blood to mix. After the ventricle arranges the blood through capillaries, the separated blood goes to its location, either through pulmonary, carotid, or systemic arteries. In a human there are four chambers of the heart. Instead of one ventricle there are two. The left ventricle carries oxygenated blood to the body while the right ventricle carries deoxygenated blood to the lungs. A fish has a closed- loop, two chambered system which allows blood to enter into an atrium. Through a muscular ventricle structure, capillaries separate the deoxygenated, and oxygenated which then sends the blood to its destination through veins. Each organism compared does however send deoxygenated blood to the respiratory system and oxygenated blood to body organs in the digestive system.