The river that changed its course in Kentucky during the 1811-12 earthquakes is the Mississippi River. The earthquakes, part of a series known as the New Madrid earthquakes, caused significant geological shifts, leading to the river temporarily flowing backward in certain sections. This phenomenon occurred as the seismic activity altered the landscape and riverbanks.
a flap of tissue that prevants blood from flowing backward is
Your heart keeps your blood "flowing"
Valves in the veins prevent the blood from flowing backward or from pooling.
valves in the veins
your skin of course!
heart valves
These are called valves.
a valve
The four heart valves.
The heart valves keep blood from flowing backward. This increases the efficiency of the pumping of the heart.
The flap of tissue that prevents blood from flowing backward is called a valve. Valves are found in veins and in the heart to ensure that blood flows in one direction and does not pool or backflow.
i think you mean bypass