0
The left and right atria are thinner walled receiving chambers of the heart where blood returns to the heart via the great veins. The two inferior chambers, the left and right ventricles, are the pumps that eject the blood into the arteries and keep it flowing through the body. If you picture it like your hands it might help. Picture holding both hands out, and in one hand you have a cup of water (atria), and in the other hand you have a squeeze pump that you constantly have to squeeze to move that water (ventricles). That hand with the pump will eventually become stronger (and therefore bigger/thicker) than the hand that is simply holding the water because of the muscle activity. So it makes sense that the atrium has some muscle, but not nearly as much as ventricles because the ventricles are acting as the pump. :-)
Wiki User
∙ 15y ago
Wiki User
∙ 12y agoThe left ventricle has to pump blood to the entire body, while the right ventricle only has to pump blood to the lungs, which requires less force. Therefore, the left ventricular wall is more muscular to provide a more powerful "push" to the systemic circulation.
Wiki User
∙ 13y agoThe walls of the ventricles are made up of myocardium (heart muscle tissue), while the walls of the aorta and other arteries are made up of simpler, layered epithelium. The ventricles (along with the atria) are responsible for the pumping action of blood throughout the body, and are made up of pectinate muscles which contract when they receive the proper signal from the SV and AV nodes. They are also 'ground zero' as far as the pressurization of the cardiovascular system, so the walls need to be thick, strong and muscular to handle the high pressure of pumping blood. The Aorta, on the other hand, does not pump any blood and is only a vessel for transporting oxygenated blood to the rest of the body. It is still much thicker than the veins which enter the heart because, by the time the blood is coming back into the heart, it is essentially the furthest it can be from the pumping action, so the intravascular pressure is at it lowest, and therefore the vein walls don't need to be very thick at all.
Wiki User
∙ 13y agoThe right ventricle pumps blood to the lungs which requires a lower pressure, so its walls are thinner than the left ventricle which must pump the blood to the rest of the body.
Add your answer:
Earn +20 pts
What difference atria and ventricles fetal pig?
the difference between the ventricles and the atria is that the ventricles are thicker
Why do auricles have thinner walls than ventricles?
Ventricles have thicker valve thicker wall so that they can withstand the intense pressure by the heart.While auricles carry blood towards the heart and suffers reduced pressure so it has thinner wall
Is the apex of the heart thicker or thinner than the ventricles?
You really can't compare the apex with both because of the apex is made up of only one of the ventricles (the left) and the left is thicker than the right.
Which chamber of heart is more thicker and why?
The wall of the ventricles is thicker than the walls of the atria as they have to be stronger as they have to pump the blood around the body where as the atria only have to pump blood into the ventricles
Why are the walls of left ventricles thicker than the walls of right ventricles?
Because the left ventricle pushes blood through most vessels in the body, so it's thicker because more force is needed for the contraction.
How do the walls of the Atria compared with the walls of the ventricles and why are they different?
The short Answer: The ventricles have thicker walls than the atrium simply because this is the part of the heart that does most of the pumping action by contracting. It has to be strong and fairly thick to cope with the pressure. (Ventricles have thicker walls than the atrium, which creates a higher blood pressure. The left ventricle has thicker walls because it needs to pump blood to the whole body. The wall of the left ventricle is 8-15 mm The right atrium's wall is approximately 2mm in thickness, due to the combined influence of the low pressure of this chamber and the ease of pumping to low pressure areas)
How do the walls of the atria compare with the walls of the ventricles and why?
The short Answer: The ventricles have thicker walls than the atrium simply because this is the part of the heart that does most of the pumping action by contracting. It has to be strong and fairly thick to cope with the pressure. (Ventricles have thicker walls than the atrium, which creates a higher blood pressure. The left ventricle has thicker walls because it needs to pump blood to the whole body. The wall of the left ventricle is 8-15 mm The right atrium's wall is approximately 2mm in thickness, due to the combined influence of the low pressure of this chamber and the ease of pumping to low pressure areas).
Why is the wall of the left ventricle thicker and stronger than the atrium?
The left ventricle is thicker and stronger than the atrium because the left ventricle allows the arteries to rum through it. The arteries have thick cellular walls so they are bigger. The arteries do not run through the atrium.
What is septal wall infarct?
It's when the wall between the left and right ventricles of the heart has an infarction.
What are the lower two chambers of heart called?
The lower two chambers of the heart are the ventricles. The left ventricle is larger, with thicker walls, than the right ventricle.
A muscular wall between the left and right ventricles?
The interventricular septum separates the left and right ventricles. This muscular wall prevents the mixing of oxygen-rich and oxygen-poor blood.
What is noticeable about the muscular walls of the atria and the ventricles?
The walls of the left ventricle are thicker due to having to pump the blood to the body. The walls of the right ventricle are thinner because blood is being pumped into the lungs for gas exchange.
