The process whose specific outcome is the progression of the heart over time, from its formation to the mature structure. The heart is a hollow, muscular organ, which, by contracting rhythmically, keeps up the circulation of the blood.
The process whose specific outcome is the progression of the heart over time, from its formation to the mature structure. The heart is a hollow, muscular organ, which, by contracting rhythmically, keeps up the circulation of the blood. (en)
Development of the human heart during the first five weeks , and the formation of the heart chambers at four and eight weeks. In this figure, the blue and red colors represent blood inflow and outflow . Initially, all venous blood flows from the tail/atria to the ventricles/head, a very different pattern from that of an adult. (en)