Aortic valve prevents backflow of blood into the left ventricle and creates the second, dubb sound.
The mitral, tricuspid, pulmonary, and aortic valves are the four heart valves that keep blood flowing in the right direction. Flaps (leaflets) on each valve open and close once per heartbeat.
The mitral and tricuspid valves transport blood from the upper chambers of the heart (the atria) to the lower chambers of the heart (the ventricles). The aortic and pulmonary valves transport blood to the lungs and the rest of the body via the ventricles.
Blood flowing through the heart chambers creates heart sounds as the cardiac valves open and close during the cardiac cycle. The vibrations of these structures caused by blood flow produce audible sounds.
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Answer:
1 Other Threats. Coral reefs are also being degraded by many other factors. The list of problems can seem endless: overfishing, fishing using cyanide and dynamite, pollution from sewage and agriculture, massive outbreaks of predatory starfish, invasive species, and sedimentation from poor land use practices.
2 Other Threats. Coral reefs are also being degraded by many other factors. The list of problems can seem endless: overfishing, fishing using cyanide and dynamite, pollution from sewage and agriculture, massive outbreaks of predatory starfish, invasive species, and sedimentation from poor land use practices.
3 Coral reefs are also being degraded by many other factors. The list of problems can seem endless: overfishing, fishing using cyanide and dynamite, pollution from sewage and agriculture, massive outbreaks of predatory starfish, invasive species, and sedimentation from poor land use practices.
Explanation:
When a cell undergoes meiosis,the outcome of the process is FOUR HAPLOID CELLS.
Meiosis refers to a form of cell division which always results in the formation of four daughter cells. The four daughters cells produce have diploid cells which contains half the original of chromosomes from the parents. A diploid cell has two of each chromosome, one from each parent. The eggs and the sperms that are involved in reproduction possess haploid cells. In meiosis, the whole process start with diploid cells which divide twice to produce four haploid cells
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Answer:
A proton is a subatomic particle with a positive charge. It is found in the atomic nucleus. ( AG Caesar) Atoms consist of smaller particles called protons, neutrons, and electrons. Here is the definition of a proton, its electric charge, where it's found in the atom, and a collection of proton facts.
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Explanation:
That flow in all directions!!!
