DNA replication is the process by which DNA makes a copy of itself during cell division. 1  The first step in DNA replication is to âunzipâ the double helix structure of the DNA molecule.
The heart is a muscular organ in humans and other animals, which pumps blood through the blood vessels of the circulatory system. Blood provides the body with oxygen and nutrients, and also assists in the removal of metabolic wastes. The heart is located in the middle compartment of the mediastinum in the chest.
organs in the human body functions location definition of organs an organ is a structure that contains at least two different types of tissue functioning together for a common purpose there are many different organs in the body the liver kidneys heart even your skin is an organusually there is a main tissue and sporadic tissuesthe main tissue is the one that is unique for the specific organ for example main tissue in the heart is the myocardium while sporadic are the nerves blood connective etcfunctionally related organs often cooperate to form whole organ systems there are 10 major organ systems in the human bodyhere are many different organs in the body the liver kidneys heart even your skin is an organ usually there is a main tissue and sporadic tissues