THORAX ABDOMEN AND PELVIS

MEDICAL

HEART AND PERICARDIUM

Question [CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
The walls of the ____ are substantially thicker because that chamber acts as the more powerful systemic pump of the heart.
A
left atrium
B
left ventricle
C
right atrium
D
right ventricle
Explanation: 

Detailed explanation-1: -Left ventricle. The walls of the left ventricle are thicker because they have to generate more pressure in order to overcome the resistance of the systemic circulation. It pumps oxygenated blood to the aorta which then transports the blood to all parts of the body.

Detailed explanation-2: -The ventricles of the heart have thicker muscular walls than the atria. This is because blood is pumped out of the heart at greater pressure from these chambers compared to the atria.

Detailed explanation-3: -The left ventricle is the main powerhouse of the heart, having to pump blood all the way around the systemic circulation. Because of this it has the largest, most muscular walls of any of the chambers. In fact, it is three times as thick as the right ventricle.

There is 1 question to complete.