Answer:
Swishing sound.
Explanation:
Human heart produces unique sound when blood flows from one chamber to the next chamber. The two main sounds produced by heart are lub abd dub sound.
The doctor's examine the Janetta's heart and told that she has incompetent right atrioventricular valve. The doctor must have heard the swishing sound after the closing of right atrioventricular valve. This sound is the direct indication of incompetent AV valve.
Answer:
because if not metal than other things like glass wood or fabric would break or not be suitable for the key hole.
Explanation:
flip flops are made of plastic.
The two lower chambers of the heat, which recurve blood from the atria and pump it into the arteries
Mutualism , is the correct answer
