It should be side chain, by looking at a diagram online, idk if im right, but it looks logical.
Short answer:
Valve which permits blood to flow from the right atrium to the right ventricle is tricuspid valve
Long answer:
The right side of the heart has lower pressure compare to the left side. There is a valve that support the lower pressure so the blood can move easily from the right atrium to the left ventricle. The valve is called tricuspid valve. It's called "Tri" because there are 3 flaps/leaflets on the valve.
For your information, the left side of the heart only has 2-leaflet valve, which make smaller circular opening compare to the 3-leaflet valve on the right side. That's because the left side has higher pressure than the right side.
Explanation:
Can be changed for the better
Answer:
Many adults in their early twenties do choose to get married. However, in the world today it is more common for young adults to live as if married without actually taking the vows. So, your answer is legally recognized domestic union relationships that don't involve marriage. This is called Con-habitation.
