Examlex
The lungs are perfused by two circulations: the pulmonary and the bronchial.The pulmonary circulation is for oxygenation of blood.The bronchial circulation supplies blood to the lung structures (tissue).
Chargaff
Refers to Chargaff's rules, which are empirical rules regarding the ratios of nucleotide bases within DNA molecules: adenine (A) pairs with thymine (T), and cytosine (C) pairs with guanine (G).
Guanine
One of the four main nucleobases found in the nucleic acids DNA and RNA; it pairs with cytosine.
DNA
Deoxyribonucleic acid, a molecule that carries the genetic instructions used in the growth, development, functioning, and reproduction of all known living organisms and many viruses.
Species
The basic unit of biological classification, defined as a group of individuals that can interbreed and produce fertile offspring.
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