Explain what differentiates the earth’s crust and lithosphere.

The crust of the Earth is differentiated from the lithosphere as the crust signifies towards a compositional layer, while the lithosphere is a mechanical layer, that is, the solid layer close to the surface of the Earth. The crust primarily comprises alumino-silicate minerals, while the lithosphere comprises some of the solid parts of the upper mantle, that is, majorly ferromagnesium silicates.

hormones in blood stream

image: dtc.ucsf.edu

endocrine glands secrete hormones into the blood stream near them; the hormones then travel in our bloodstream until it reaches its destination, called a target cell, in distance parts of the body. in the target tissue, hormones lock onto the target’s plasma membrane, called the receptor site.

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