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Why are the walls of the ventricles made of muscle?
The walls of your ventricles are made of smooth muscle because they need to be able to push the blood through your heart. There are valves that open and close to make the blood flow the correct way in the ventricles. The left ventricle has a thicker layer of smooth muscle because it needs to pump blood to the entire body while the right ventricle's smooth muscle doesn't need to be as thick because it is just pumping blood to the lungs which aren't very far away.
Which type of muscle are located in the walls of internal organs and are not under voluntary control?
smooth muscle
How do walls of the artia compare with the walls of the ventricles?
Much thinner.
In longitudinal section how do the walls of the atria and ventricles differ?
In longitudinal section, the walls of the atria are thinner, and lined with pestinate muscles. The walls of the ventricles, meanwhile, are thick and muscular.
Another name for walls of ventricles?
Another name for the walls of ventricles is the Purkinje fibers.
What muscles make up walls of most internal organs?
Much of our internal organs is made up of smooth muscles. Smooth muscles make up the walls of many organs; eg bladder, gallbladder, arteries, and veins, digestive tract and oesophagus. The smooth muscles are controlled by hormones and the nervous system. Smooth muscles are often called involuntary muscles because we cannot control there movement.
What causes the atrio ventricular valves to close?
The rise in pressure inside the ventricles, when the walls of the ventricles contract.
What is heart string?
Hold the valves to inner walls of ventricles
Why have the ventricles got thicker walls then the atria?
atria are just the receiving chambers, it is the ventricles that actually pump the blood into the pulmonary and systemic circuits
What muscles are inside many internal organs?
There are a number of muscles found in the walls of many internal organs. The common ones include smooth muscles and involuntary muscles among others.
Why do arteries able to adjust to the high pressure of the blood when ventricles pump blood?
Because the have thicker walls and sensors in the walls
Functions of the atria?
They have thin walls and they collect blood before it enters the ventricles.
