Genetic variation is stored in a populationâs gene poolâthe combined. alleles of all of the individuals in a population. Different combinations of. alleles in a gene pool can be formed when organisms mate and have offspring. Each allele exists at a certain rate, or frequency.
Also found in: Wikipedia. cosÂ·tal surÂ·face. the surface of certain structures that face the ribs; they are the costal surfaces of the lungs (facies costalis pulmonis [TA]) and the scapula (facies costalis scapulae [TA]).
Lacteals are specialized lymphatic capillaries found in the small intestine that have the special function of absorbing dietary fats. Other nutrients that are absorbed by the digestive tract are absorbed into blood capillaries, not lymphatic capillaries.acteals are specialized lymphatic capillaries found in the small intestine that have the special function of absorbing dietary fats. Other nutrients that are absorbed by the digestive tract are absorbed into blood capillaries, not lymphatic capillaries.