Yes. Male and female. You're welcome. ;)
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.
To learn more about valves of the heart, here
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Answer:
True
Explanation:
Climate change is a long-term shift in global or regional climate patterns. Often climate change refers specifically to the rise in global temperatures from ... from the sun's rays inside the atmosphere causing Earth's average temperature to rise. ... Throughout Earth's history, climate has continually changed.
Answer:
The meristem is a type of tissue found in plants. It consists of undifferentiated cells (meristematic cells) capable of cell division. Cells in the meristem can develop into all the other tissues and organs that occur in plants.
