What is the difference between atria and ventricles? What is the role of the ventricles and atria?

1. The wall of the ventricle is thicker than the wall of the atrium. The left ventricular wall is thicker than the right ventricular wall. The thicker the walls of the heart and the more muscular it is, the more forceful it is to contract and relax.

Adaptable to the respective function. The contraction of the ventricles carries blood to the capillaries throughout the body or to the capillaries of the lungs, while the atrial contraction only sends blood into the ventricles, which are thicker than the walls of the atrium. Similarly, the left ventricle carries blood over a longer distance than the right ventricle, which carries blood throughout the body, while the right ventricle transports blood to the lungs.

2. The left atrium is connected to the left ventricle, and the right atrium is connected to the right ventricle. The cavities on the left and right sides are not connected to each other.

3. There is a valve between the atria and the ventricles, which can only open towards the ventricles, so as to ensure that blood can only flow from the atria to the ventricles. Similarly, there is a valve between the ventricle and the artery, which can only open towards the artery, thus ensuring that blood can only flow from the ventricle to the artery. In conclusion, the valve has the effect of preventing blood from flowing backwards.

The atrium, the two cavities above the inside of the heart, the one on the left is called the left atrium, and the one on the right is called the right atrium. The left atrium is connected to the pulmonary veins, and the right atrium is connected to the veins of the superior and inferior lumens. The left atrium receives blood coming back from the lungs, and the right atrium receives blood coming back from the rest of the body.

There is a valve-lined pathway between the atria and the ventricles, from which blood flows into the ventricles when the atria contract.

Ventricle. xīnshì

ventricle]

The two cavities below the inside of the heart, the one on the left and the right one on the right, are thick and muscular. The left ventricle is connected to the aorta, and the right ventricle is connected to the pulmonary artery. Blood is pressed from the atria into the ventricles and from the ventricles into the arteries, where it is transported to the lungs and the rest of the body.

Distinguish. First, the role is different.

The atria are blood reservoirs that act as auxiliary pumps; The ventricles are muscle pumps that perform the function of ejecting blood.

Distinguish. Second, the location is different.

The atria are the two cavities inside the heart, the one on the left is called the "left atrium" and the one on the right is called the "right atrium";

The ventricles are the two cavities inside the heart, the one on the left is called the "left ventricle" and the one on the right is called the "right ventricle".

The heart resembles my fist, shaped like a peach, and is located above the diaphragm, with the lungs between the two lungs and to the left. The heart is a hollow muscular organ, mainly composed of myocardium, with four chambers: left atrium, left ventricle, right atrium and right ventricle.

The left and right atria and between the left and right ventricles are separated by septa, so they are not connected to each other, and there are valves between the atria and the ventricles, which allow blood to flow only from the atria into the ventricles and not backwards.

Except that the anatomy is different. It's just a little different. It is.

The atria are larger than the ventricles.

To put it simply. There's a room in the house haha

The right atrium is located in the upper right side of the heart, with a thin wall and a large cavity, and the part that protrudes to the front left is called the right atrial appendage. According to the direction of blood, the right atrium has 3 inlets and 1 outlet: there is the superior vena cava orifice above, the inferior vena cava orifice in the text, and the coronary sinus orifice between the inferior vena cava orifice and the right atrioventricular orifice, which respectively guide the blood of the upper body, lower body and heart avoidance of the human body into the right atrium; The outlet is the right atrioventricular orifice, from which blood flows into the right ventricle.

In the lower part of the atrial septum of the right atrium, there is a shallow ovoid fossa called the fossa ovale. During the fetal period, this is the foramen ovale, through which the left and right atria communicate. After birth, this hole gradually closes, and the remaining depression is called the fossa ovale.

If the foramen is not closed about 1 year after birth, it is a congenital disease called atrial septal defect (see Incomplete foramen ovale), which accounts for 51% of congenital cardiovascular diseases.

Left atriumThe left atrium is located behind the left side of the right atrium and forms most of the fundus, and the part that protrudes to the front right is called the left atrial appendage. The left atrium has four inlets and one outlet: the inlet is the pulmonary vein, and the outlet is the anterior and inferior left ventricular orifice, from which blood flows to the left ventricle.

Hello, according to the question you asked, the atria are the two cavities inside the heart that are above the inside, the one on the left is called the "left atrium" and the one on the right is called the "right atrium", with thick walls and muscular. The atria are blood reservoirs that act as auxiliary pumps; The ventricles are the muscle pumps that complete the ejection function, and the muscles are strong.

The ventricles are the two cavities inside the heart, the one on the left is called the "left ventricle" and the one on the right is called the "right ventricle". The walls of the ventricles are thick and muscular. The walls of the left ventricle are thicker and more muscular than the right ventricle.

It is recommended that if there is an abnormality, it is best to go to the hospital to check and confirm the diagnosis before the symptoms**, Wanglou owner, thank you.

The right atrium is mainly responsible for the venous blood of the whole body**, and the left atrium is mainly responsible for the blood of the arterial system of the whole body**, that is, the four atrioventricles of the heart, which together meet the normal blood circulation of the human body.

Classification: Resource Sharing.

Analysis: The structure and function of the heart.

1. General structure.

1. 1.It is an organ with a cavity made of heart muscle and is divided into four chambers.

The heart has four chambers, the right atrium and the right ventricle on the right side of the heart, and the left atrium and left ventricle on the left. The atria are blood reservoirs that act as auxiliary pumps;

The ventricles are muscle pumps, which complete the ejection function, and the muscles are strong, and the base is composed of two layers of muscle fibers arranged in a spiral pattern, and a layer of roughly annular muscle fibers is sandwiched between the two layers. The spiral-arranged muscle fibers originate from the tendinular ring between the atrioventricles, and their fibers descend around the two ventricles to the apex of the heart, and then fold back up to form the **muscle. This arrangement of ventricular muscle fibers has certain physiological significance, and when it contracts, the ventricles shrink in the upper and lower directions and from the surrounding inward at the same time, resulting in a strong blood expulsion.

The muscles of the left ventricular wall are about three times thicker than those of the right ventricle, so the left ventricle has a stronger systolic force than the right ventricle.

The left atrium is good blood, oxygen-rich blood; The blood in the right atrium is waste blood.

The reason why the blood does not collapse and flow is because there is a special structure in the heart:

2. 2.Atrioventricular valve.

The connections between the chambers and between the chambers are basically non-fibrous connections, with atrioventricular ring connective tissue; The atrioventricles are kept separate, with atrioventricular valves at the atria and ventricles, mitral valve on the left and tricuspid valve on the right, and a semilunar valve between each ventricle and the aorta.

These valves open in one direction, ensuring that blood does not flow backwards.

The thickness of the atrium and ventricular walls is related to the distance at which blood is delivered. The walls of the ventricles are thicker as compared to the atria because the blood from the atria only flows to the ventricles that communicate with it; The wall of the left ventricle is thicker than that of the right ventricle, and the left ventricle transports blood to the whole body, so it needs to have a greater contractile force with the socks, and the wall should be thicker. Normally, the thickness of the right ventricular wall is only 1 3

Too thick is also an anomaly.