<h2><u>Answer:</u></h2>
The correct option is B (in one direction)
<h3><u>Explanation:</u></h3>
The two atrioventricular (AV) valves, the mitral valve (bicuspid valve), and the tricuspid valve, which are between the upper chambers (atria) and the lower chambers (ventricles). The two semilunar (SL) valves, the aortic valve and the aspiratory valve, which are in the conduits leaving the heart.
So the atrioventricular valves enables blood to spill out of the atria to the ventricles. be that as it may, regularly keeps the reverse of blood and opening. ... these valves to open and after that blood goes through from the atria into the ventricles. and afterward when the weight is developing in the ventricles.
Cells are made up of organelles
There might be fewer rabbits and foxes
Destruction and replacement of ournative plants by invasive species has several significant consequences. Wildlife that depends on native plants is often unable to adapt and may be forced to leave the area or die out.Invasive aquatic plants can completely fill a water body, driving fish and wildlife from the area.
Liquid 1 and 4, because they have the same melting point and density.