Tubular heart

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Tubular heart
Diagram to illustrate the simple tubular condition of the heart.
Heart of human embryo of about fourteen days.
Days 21
Precursor splanchnic mesoderm
Latin cor tubulare
Code TE E5.
Anatomical terminology

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

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". Retrieved 2007-09-18. 
  3. ^ "Heart Tube Formation". Retrieved 2007-09-18. 

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