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Why do the circulatory systems of land vertebrates have separate circuits to the lungs and to the rest of the body?
The large decrease in blood pressure as blood moves through the lungs may prevent efficient circulation through the rest of the body.
Which ventricle has more cardiac muscle?
The left ventricle has more muscle because it pumps blood to the rest of the body, the right ventricle only pumps blood to the lungs which is a lot closer.
What is the structure and location of the diaphragm?
The diaphragm is a large muscle just below the lungs. It help us breathe.The diaphragm is located inferior to the lungs and deep in the thoracic cavity.Diaphragm is present in upper side of the abdomen and lower side of the chest. You need to see the original diaphragm in the dissected body. That is very beautiful structure to see.
What is the principal driving force for exhalation at rest?
During exhalation at rest, the principal driving force is passive elastic recoil of the lungs and chest wall. As the diaphragm relaxes and the external intercostal muscles relax, the lungs passively recoil to their resting size, which pushes air out of the lungs. This process does not require active muscle contraction.
Does Aerobic exercise strengthens the heart body and lungs.?
Aerobic exercise improves the ability of the heart to supply the rest of the body with blood by increasing the volume it can pump. The heart as a muscle does not get stronger from this type of exercise, rather it becomes more elastic and the volume of blood it can move increases. The lungs have no contractile muscle fibers themselves but they are attached to your diaphragm which is a muscle and can be exercised and strengthened like any other one.
What transports air to the lungs?
AnswerAir is actually forced into the lungs by atmospheric pressure. But here's the rest of the story. The diaphragm, a muscle below the lungs, contracts and actually makes the space in which the lungs are located, the thorax, get bigger. When this space gets bigger, the pressure inside it decreases. There is now a difference in pressure between the lung cavity and the outside air with the outside air having more pressure. Air goes from where the pressure is higher to where it is lower, and so it goes into the lungs. That's called inspiration or inhaling. When the diaphragm relaxes, the thorax gets smaller and the pressure increases in the lungs and air is forced out. Click the link for more information.
What is muscle tone?
Muscle tone refers to residual muscle tension or in another words levels of contraction of the muscle while at rest. Muscle tone is what makes the muscles feel and look like while at rest.
Is there anyway to build muscle on your face to make it wider?
It will come slowly as you build muscle on the rest of your body. It will come slowly as you build muscle on the rest of your body.
Function of the cardiac muscle?
Cardiac muscle tissue is the tissue that makes up the bulk of your heart and when it contracts it will squeeze blood to your lungs through the pulmonary circuit, and to the rest your body through the systemic circuit.
When the lungs are at rest between breathing cycle the air pressure in the lungs is?
Air goes into or out of the lungs due to differential pressure. On inhalation, the pressure within the lungs is below atmospheric, so outside air rushes in. On exhalation, the pressure within the lungs is above atmopheric, so inside air rushes out. When you stop breathing for the moment at the end of exhalation, or when you transition from inhalation to exhalation at the end of inhalation, there is no air flow, because there is no differential pressure. Assuming that you do not close your larynx, then, when the lungs are at rest, the air pressure in the lungs is the same as atmospheric, and this occurs twice in each complete breathing cycle.
How do you reverse muscle tiredness?
You can not reverse muscle tiredness, you just have to rest them.
How thick is the diaphragm?
5 millimeters
