Which best describes how the cardiovascular and respiratory systems work together? The respiratory system makes it possible for the cardiovascular system to make blood. The respiratory system feeds gases into the bloodstream to support the needs of the body. The respiratory system takes gases out of the blood so that no gases circulate in the body. The respiratory system helps the blood make its own gases from scratch.

In iceland, the mid atlantic ridge runs through the center of the contry. what can you conclude about the apperence of iceland many thousands of years from now?

The fish shown above is a tarpon. it is a fast-swimming and powerful open-water fish. its closest relatives, oddly, are burrow-dwelling conger eels that stay on the bottom. both eels and tarpon developed from snake-like larvae that float in the plankton during the first stages of life. once they mature, tarpon and eels are not found near one another in the ocean. the tarpon and the eel illustrate all of the following except

Why are fossils not found in igneous rocks? igneous rocks are made from cooling of lava or magma. igneous rocks are found too deep underground. igneous rocks are too dark in color to contain fossils. igneous rocks are too dense to contain fossils.