Tubular heart

The tubular heart or primitive heart tube is the earliest stage of heart development.

Tubular heart
Diagram to illustrate the simple tubular condition of the heart.
Heart of human embryo of about fourteen days.
PrecursorSplanchnic mesoderm
Gives rise toHeart
Latincor tubulare
Anatomical terminology

From the inflow to the outflow, it consists of sinus venosus, primitive atrium, the primitive ventricle, the bulbus cordis, and truncus arteriosus.[1]

It forms primarily from splanchnic mesoderm.[2] More specifically, they form from endocardial tubes, starting at day 21.[3]


  1. "Development of the human heart: days 15–21". Retrieved 2007-09-18.
  2. "Text for Cardiovascular Development". Archived from the original on 2007-06-23. Retrieved 2007-09-18.
  3. "Heart Tube Formation". Retrieved 2007-09-18.

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