What is the structure most closely associated with the destruction of old cell

The structure most closely associated with the destruction of old cell are lysosomes.

Explanation:

Lysosomes are the organelle that destroys the damaged organelles inside the cell. And acts as same function like waste management. It is present in both plants as well as animals. The opposite to it or the construction one is ribosome. In lysosomes it has certain enzymes as well as acids that helps in digestion of damaged cell materials, and also in recycling it. Not only are the cellular waste it may be some old or torn out cells. It acts as a cellular stomach. They are generally fluid filled sacs.

introduction of a drug directly into the respiratory tract is a form of inhalation administration.

in cartography, a contour line (often just called a "contour") joins points of equal elevation (height) above a given level, such as mean sea level. a contour map is a map illustrated with contour lines, for example a topographic map, which thus shows valleys and hills, and the steepness or gentleness of slopes.

explanation: