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]).
Answers. Best Answer: Connective tissue function:- The cartilage rings support the trachea and prevent it from collapsing when air is taken in.Epithelial Tissue function:- The ciliated epithelium cleans out the particulate material in the air before it enters the lungs.There is also nervous tissue running through the area and smooth muscle tissue in the arteries and veins that are present as well.pithelial Tissue function:- The ciliated epithelium cleans out the particulate material in the air before it enters the lungs. There is also nervous tissue running through the area and smooth muscle tissue in the arteries and veins that are present as well.