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Which of the following heart valves are mechanical valves? i. Ball Valve ii. Autograft Valve iii. Xenograft Valve iv. Single Leaflet Valve v. Homograft Valve vi. Bi leaflet Valves

Which of the following heart valves are mechanical valves? i. Ball Valve ii. Autograft Valve iii. Xenograft Valve iv. Single Leaflet Valve v. Homograft Valve vi. Bi leaflet Valves Correct Answer i, iv, vi

The ball valve, the single leaflet valve and the bileaflet valves are artificial mechanical valves. The incoming or the outgoing blood exerts pressure on these valves and open them, allowing the blood to flow. Once the normal flow of blood due to heart contractions has ceased, the valves close. The Autograft valve, Xenograft Valve and Homograft valves are all valves that have been taken from living beings. The autograft valve is taken from the same human being, mostly from the inferior vena cava. Xenograft valve is a bovine(cow) or a porcine(pig) valve. Homograft valves are valves taken from another human.

Related Questions

Consider the following question and statements and decide which of the statements is sufficient to answer the question. There are seven balls of different size and colors: green yellow, blue, orange, red, pink and black. What is the order of the balls from largest to smallest? Statements: 1. The red ball is larger than the green ball. 2. The pink ball is the smallest. 3. The blue ball is the largest. 4. The green ball is larger than the yellow ball. 5. The yellow ball is larger than the orange and black balls.
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S1:The heart is pump of life.
P :They have even succeeded in heart transplants.
Q :Nowadays surgeons are able to stop a patients heart and carry out complicated operations.
R :A few years ago it was impossible to operate on a patient whose heart was not working properly.
S :If heart stops we die in about five minutes.
S6:All this was made possible by the invention of heart-lung machine.

The Proper sequence should be:
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