<span>Because they are composed of material that is denser than that of the continental crust. As such oceanic crust is less buoyant than continental crust and so where oceanic crust collides with continental crust, the oceanic rust tends to be forced beneath the continental crust.</span>
It's caused by blood pooling in the legs, so there's insufficient return to the heart and brain. Normally, moving one's legs helps to pump blood back to the heart through muscle contraction. Locking the knees makes standing still easier, but reduces use of the leg muscles. In some people, this pooling may lead to hypoperfusion of the brain and fainting, which is essentially the body's way of putting the brain and the legs and the heart at the same level.
Answer:
i would say the planets revolve around the sun
Circulatory system, respiratory system, and the digestive system.
<span>Nerve cells of medusa are specifically organised into <span>a "nerve net" which is a loose network of nerves, located in the epidermis. The nerve net is the simplest form of a nervous system which allows organisms to respond to physical contact. Medusa detects various stimuli including the touch of other animals via this nerve net. Medusa is then capable to respond to its environment, cannot detect the source of the stimulus.</span></span>
