Anonymous
Anonymous asked in HealthDiseases & ConditionsHeart Diseases · 1 decade ago

What is the function of the Pulmonary Valve? And the Aortic Valve?

please help!

6 Answers

Relevance
  • Anonymous
    1 decade ago
    Favorite Answer

    Jenius woop,

    I have already answered this question for you when you asked -

    "Do arteries in the SYSTEMATIC circulation have VALVES????????????????????"

    I shall modify my original answer for you in the hope that you will better understand.

    The semi-lunar valves of the pulmonary artery, which is situated between the outflow tract of the right ventricle and pulmonary artery; - and the aorta, which is situated between the outflow tract of the left ventricle and aorta, both assure a unidirectional flow of blood. This is to prevent a backflow into the heart.

    Hope this helps

    matador 89

  • couty
    Lv 4
    5 years ago

    Pulmonary Valve Function

  • 1 decade ago

    The pulmonary valve, also known as pulmonic valve, is the semilunar valve of the heart that lies between the right ventricle and the pulmonary artery and has three cusps. Similar to the aortic valve, the pulmonic valve opens in ventricular systole, when the pressure in the right ventricle rises above the pressure in the pulmonary artery. At the end of ventricular systole, when the pressure in the right ventricle falls rapidly, the pressure in the pulmonary artery will close the pulmonic valve.

    The closure of the pulmonic valve contributes the P2 component of the second heart sound (S2). The right heart is a low-pressure system, so the P2 component of the second heart sound is usually softer than the A2 component of the second heart sound. However, it is physiologically normal in some young people to hear both components separated during inhalation.

    The aortic valve is one of the valves of the heart. It lies between the left ventricle and the aorta.

    Morphology

    The aortic valve has three cusps. These cusps are half moon shaped hence also called aortic semilunar valve. Each cusp has a small swelling in the center called the nodule. Dilatation of the wall of the aorta behind these cusps is called aortic sinus. When the aortic valve is open, the normal size of the orifice is 3-4 cm² in adults.

    Function & Physiology

    During ventricular systole, pressure rises in the left ventricle. When the pressure in the left ventricle rises above the pressure in the aorta, the aortic valve opens, allowing blood to exit the left ventricle into the aorta. When ventricular systole ends, pressure in the left ventricle rapidly drops. When the pressure in the left ventricle decreases, the aortic pressure forces the aortic valve to close. The closure of the aortic valve contributes the A2 component of the second heart sound (S2).

    Source(s): www.wikipedia.com
  • 1 decade ago

    The pulmonary valve, also known as pulmonic valve, is the semilunar valve of the heart that lies between the right ventricle and the pulmonary artery and has three cusps. Similar to the aortic valve, the pulmonic valve opens in ventricular systole, when the pressure in the right ventricle rises above the pressure in the pulmonary artery. At the end of ventricular systole, when the pressure in the right ventricle falls rapidly, the pressure in the pulmonary artery will close the pulmonic valve

  • How do you think about the answers? You can sign in to vote the answer.
  • Anonymous
    5 years ago

    For the best answers, search on this site https://shorturl.im/avk3O

    The Ross procedure (or pulmonary autograft) is a cardiac surgery operation where a diseased aortic valve is replaced with the person's own pulmonary valve. A pulmonary allograft (valve taken from a cadaver) is then used to replace the patient's own pulmonary valve. Pulmonary autograft replacement of the aortic valve is the operation of choice in infants and children, but its use in adults remains controversial. Consult your cardiologist.

  • Anonymous
    6 years ago

    RE:

    What is the function of the Pulmonary Valve? And the Aortic Valve?

    please help!

    Source(s): function pulmonary valve aortic valve: https://trimurl.im/j93/what-is-the-function-of-the...
Still have questions? Get your answers by asking now.