Functions of each parts of the heart?

Answer 1

Parts:

Pulmonary veins(left and right)

Superior vena cava

Inferior vena cava

Right atrium(auricle)

right ventricle

Pulmonary Arteries(left and right)

Left atrium(auricle)

Right ventricle

Left ventricle

semi-lunar valve

bicuspid valve

Function:

To pump blood.

Right side pumps to the lungs & the left side pumps to the body.

Answer 2

The basic function of the heart is to act as a pump to move oxygen around the body and provide a path for metabolic byproducts (waste) away from other organs and tissue (brain, muscles, etc,).

The Human heart has 4 chambers. Since it is a complete circuit there is no real start or finish, but to start things I will describe each part as the blood flows first coming from the body.

The first chamber is the Right Atrium. Blood flows into the right atrium from the large veins (superior and inferior vena cava). The main function of this chamber is to collect blood and then push it into the Right Ventricle. Both Atria contract prior to the Ventricles. As the Right Atria contracts it forces blood past a structure called the Tricuspid Valve. The function of this valve is to open when the pressure in the Right Atria is higher than the Right Ventricle and to close when the pressure in the Right Ventricle is higher than the Right Atria. This keeps blood from flowing backward allowing the heart to pump blood in one direction (also why the Atria must contract before the Ventricles).

The second chamber is the Right Ventricle. It receives blood from the Right atria, and then contracts. When the pressure in the Right Ventricle exceeds the pressure in the Right Atria the Ticuspid Valve snaps close making an audible sound (that is part of the "lub" in the "Lub-dup" sound you hear if you listen to someones heart beating). As contraction of the Right Ventricle continues the Valve opens and blood flows from the Right Ventricle into the Pulmonary Arteries. The purpose of the Pulmonary Valve is to keep blood from flowing back into the Right Ventricle when the Right Ventricle relaxes.

Blood flows from through the Pulmonary Artery to the lungs, picks up oxygen and releases CO2, then returns to the heart through the Pulmonary Veins. These veins dump the blood into the Left Atria. The function of the left Atria is to collect oxygenated blood from the Lungs and force the blood into the Left Ventricle. This works much like the right side. The Left Atria first contracts and pushes blood past the Mitral Valve that opens when pressure in the Left Atria is higher than in the left Ventricle and closes when the pressure in the Left Ventricle is higher than the in the Left Atria. The purpose of the Mitral Valve is to keep blood from being pumped backward. The pressure in the left side, due to the fact that it is being pumped out to all of your body, rather than just to the lungs, is much higher, so failure of the Mitral Valve is not uncommon. This is often call Mitral Regurgitation meaning blood is flowing the wrong way through the Mitral Valve.

Once blood is in the Left Ventricle, the Left Ventricle contracts and the Mitral Valve closes. The Aortic Valve then opens and blood flows out of the heart into the Aorta and onto the rest of the body. When the pressure in the Left Ventricle drops to below the Aorta as blood leaves, the Aortic Valve shuts making the "dub" sound of the "lub-dub".

Electrically:

In order to make the heart work, the base unit of the heart (cells, cardiomyocytes) must all contract at the same time for each chamber. Additionally the Atria must contract before the Ventricles, and all these cells must rest again and be ready to contract, repeating this as fast as 4-5 times a second. This coordination is accomplished by an elaborate electrical system. The primary "Pace Maker" that defines how fast your heart beats is located in the Right Atria and is called the Sinoatrial Node (SA node). The SA node sends a signal through out the Atria (Left and Right), and the Atria contract. The message then reaches a structure called the Atrioventricular Node (AV nose) located between the Atria and Ventricles. The job of the AV node is too fold, to integrate (send on as single signal) the signal from the SA node, and to take over as the Pace Maker in the event that the SA node fails. The AV node then sends signals down a structure called the Bundle of HIS then through Purkinje Fibers. These too structures function as fast wires so that the signal to contract can reach all the cells in the ventricles at about the same time (>2msec).

Summary:

The heart is a pump that pumps blood through out our bodies. It does this using Pressure-Volume work. Both Atria Contract before the Ventricles, and then the Ventricles contract. This is accomplished by an internal electrical system.

Answer 3

The parts and functions of heart are: Superior Vena Cava--> allows the oxygen-poor blood to flow from the upper part of the body Inferior Vena Cava--> allows the oxygen-poor blood to flow from the lower part of the body There are two chambers of the heart The atria is the upper part chamber of the heart Atria--> these are merely containers where blood collects The Ventricles are the lower part of the chamber of the heart Ventricle--> they are responsible for keeping blood moving through all parts of the body

Answer 4

The heart is a specialized organ, and the only one in the body made of cardiac muscle. Heart cells are called cardiomyocytes and make up muscle fibers that conduct electrical impulses. The function of the heart, which is to keep blood flowing throughout the body, is controlled by involuntary areas of the brain. Blood is necessary for the survival of the tissues because red blood cells carry oxygen, which is necessary for cellular processes, and the plasma carries nutrients to the tissues and waste away from the tissues.

Heart structure

The human heart has four chambers. The upper chambers are called the atria, and the lower chambers are the ventricles. The left and right side of the heart are separated by a thick interventricular (between the ventricles) and interatrial (between the atria) septum. The thick tissue is called themyocardium. The chambers are lined with a thin membrane called theendocardium, which prevents the blood from clotting as it passes through the heart. The heart is protected by a membrane called the pericardium. The outer pericardium resembles a fibrous sac and is made of connective tissue, holding the heart in place in the chest.

Valves separate each atrium and ventricle, as well as the exit points to the lungs and body, to prevent the backflow of blood. The tricuspid valve (also known as the right atrioventricular valve) separates the right atrium and ventricle. The mitral valve, also known as the bicuspid valve, separates the left atrium and ventricle.

The heart beat

Electrical impulses along the nerve fibers in the cardiac tissue cause the heart to contract, squeezing blood out from the heart muscle into the aorta, the first and largest blood vessel. When the fibers relax, blood flows into the heart from the inferior and superior vena cava, the endpoints of the peripheral venous system carrying deoxygenated blood from the body. A heart beat is usually thought of as "thump-thump". This is systole-diastole. Systole is atria-ventricle contraction, and diastole is atria-ventricle relaxation in overlapping events.

Systole is started by the heart's natural pacemaker in the right atrium - the sinoatrial (SA) node, a specialized group of cardiac cells. The SA node has the fastest rate of depolarization in the heart tissue. The electrical impulse started by the SA node travels to the atrioventricular (AV) node in the interatrial septum to complete systole. In the interventricular septum is the bundle of His, known as the AV bundle.

The bundle of His receives the signal from the AV node and transmits it to the left and right bundle branches in the apex of the heart. The impulses travel along specialized nerve fibers, called Purkinje fibers, to other parts of the heart to produce ventricular systole while the atria have begun diastole. The atrium contracts (systole) immediately before the ventricle contracts.

Blood flow

During diastole blood is received by the right atrium. It is forced into the ventricle by systole, and then when the right ventricle contracts it pushes blood through the pulmonary semilunar valve and into the pulmonary artery, which carries deoxygenated blood to the lungs for oxygenation. The blood then flows into the left atrium of the heart through the pulmonary vein, and then to the left ventricle. The left ventricle has the thickest wall of any other chamber in the heart and contracts more forcibly, forcing blood through the aortic semilunar valve and out to the body (See a video of the heart functioning here).

Structure of the fetal heart

The structure of the fetal human heart is slightly different from an adult heart. An opening in the interatrial septum called the foramen ovale allows blood to bypass the pulmonary circulation. Fetal blood is oxygenated by the maternal circulation instead of the lungs.

Answer 5

This is a very complicated organ as it is composed of septum, the heart muscle, the pericardium which is the outerlayer and mycocardium which is the middle layer of the heart muscle. From here there are six chambers, that is, three on the left and thre of the right.

To understand the functions of the heart, one must first understand the role of the brain in sending signals to the blood to move. The blood's contractions causer it to move upwards certain tubules in the body towards the heart. There are diffferent blood vessels, these are:

-Veins

-Arteries

-Atria

-Ventricles

Ventricles lead from the veins or arteries in the heart. As it happens, blood is transported to the lungs so that it can remove the oxygen from the blood as the lungs require the oxygen in order to function and maintain homeostasis. The atria receive blood from the ventricles and send blood from the left (lungs) to the right, which will then send blood to all parts of the body. Carbon dioxide can accumulate after respiration and is toxic to the body, therefore there is an extra part of the heart which many professionals forget to mention. This is called the Cardi-corpus Alveoli. This particular structure is microscopic and secretes Carbon dioxide neutrilising atoms still unknown to modern scientists.

Let me know if it helped you :)

I am currently a med student specialising in cardiology and so I am proficient in this field. THanks

Answer 6

the function of heart is..the heart circulates our blood.

Answer 7

it keeps you alive