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The muscles in your legs help transport blood back to your heart. The veins in your legs also have valves to help this process and prevent blood from flowing back down towards your feet.
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How is blood kept moving in the veins of the legs?
The muscles in your legs help transport blood back to your heart. The veins in your legs also have valves to help this process and prevent blood from flowing back down towards your feet.
Blood in veins is kept flowing in one direction by the presence of?
Valves, allown blood through in one direction when the pressure builds up but close when pressure is applied in the opposite direction.
What were the elements of the slave codes?
It kept African captives from owning property, receiving an education, moving about freely, or meeting in large groups.
What were elements of a slave code?
It kept African captives from owning property, receiving an education, moving about freely, or meeting in large groups.
What were the elements of a slave code?
Slave codes were laws that defined the status of slaves and the rights of slave owners. They typically restricted the rights of slaves, making it illegal for them to marry, gather in groups, or learn to read and write. These codes also outlined harsh punishments for slaves who disobeyed their owners or attempted to escape.
How is blood kept moving backwards in your veins?
Your veins have a system of valves that work to keep the back flow of blood from returning the areas where blood has already passed. Once the left ventricle of the heart has finished contracting, gravity will tend to pull blood downward. When this happens, blood pushes back the valves, forcing them closed. The valves will reopen when the force of the blood being pumped exceeds the amount of force opposing the valves. As a side note, valves work to allow flow of a fluid in one direction only. Sphincters (such as your cardiac sphincter in your stomach) allow for fluid or in the stomach's case, a bolus, to enter and exit your stomach, allowing an individual to vomit. Rats and horses do not have cardiac sphincters, thus making it impossible for them to vomit.
Who kept the western front from moving much?
the french
Was Milton Hershey homeschooled?
no. he kept moving in his childhood.
A large shed where aircraft is kept?
in a large shed
Where are the aeroplanes kept?
Aeroplanes are kept in large sheds called 'Hangers'
What force kept the planets moving in their orbits about the sun?
inertia
Why is a closed circulatory system more efficient than an open circulatory system?
One advantage of the double closed circulatory system is that the blood is kept inside arteries or veins all the time. This stops the blood mixing with other bodily fluids and helps with the transport of the blood around the body. Another advantage of the double closed compared to the open system is that in the double system the blood is always kept at a high pressure. This is an advantage as the high pressure of the blood means that the blood can travel faster around the body and deliever more oxygen to the body's cells.
