Examlex
In an eclipsing binary, the longer the stages of the eclipse take, the ________ the star.
Erythropoietin
A peptide hormone secreted mainly by kidney cells; stimulates red blood cell production.
Circulatory System
The body system that transports nutrients, oxygen, carbon dioxide, hormones, and blood cells to and from cells in the body to nourish it and help fight diseases.
Vertebrate
An animal possessing a backbone or spinal column, including mammals, birds, reptiles, amphibians, and fish.
Lymph System
A network of vessels, tissues, and organs that helps to maintain the body's fluid balance and protect it from infections.
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