the heart begins to beat by 10th week of gestation in prenatal development.
when does the heart begin to beat in prenatal development?
by 10th week of gestation
heart development









































heart development (also known as cardiogenesis) refers to the prenatal development of the human heart. this begins with the formation of two endocardial tubes which merge to form the tubular heart, also called the "primitive heart tube", that loops and septates into the four chambers and paired arterial trunks that form the adult heart. the heart is the first functional organ in vertebrate embryos, and in the human, beats spontaneously by week 4 of development.
heart development
bullet::::- fetal pig









































bullet::::- timeline of human prenatal development









































bullet::::- transplacental carcinogenesis









































section::::further reading.









































bullet::::- martin, r. p. & dombrowski, s. c. (2008). prenatal exposures: psychological and educational consequences for children. new york: springer. doi: 10.1007/978-0-387-74398-1









































bullet::::- "prenatal development - prenatal environmental influences - mother, birth, fetus, and pregnancy." social issues reference. version child development vol. 6. n.p., n.d. web. 19 nov. 2012. http://social.jrank.org/pages/515/prenatal-development-prenatal-environmental-influences.html.
prenatal development