Development Animation - Heart Atrial Septation: Difference between revisions
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[[File:Heart1_atrium icon.jpg|thumb]] | [[File:Heart1_atrium icon.jpg|thumb]] | ||
''' | ==Terms== | ||
'''ostium primum''' - (primary opening, first opening) In early [[heart|heart]] development during atrial septation, the initial [[S#septum primum|septum primum]] is incomplete leaving this initial opening between the left and right atria. Later the [[S#septum primum|septum primum]] begins to degenerate forming a second opening, the [[O#ostium secundum|ostium secundum]]. | |||
'''septum primum''' - (primary septum) In early [[heart|heart]] development in the atrial wall a superior region in the midline extends downward, forming the initial incomplete separation ([[S#septation|septation]]) of the right and left atria leaving an opening the [[O#ostium primum|ostium primum]]. This initial structure partially breaks down forming the [[O#ostium secundum|ostium secundum]] and later fuses with the [[S#septum secundum|septum secundum]]. Note that complete functional and anatomical separation of the right and left atria occurs after birth with activation of the pulmonary system. | '''septum primum''' - (primary septum) In early [[heart|heart]] development in the atrial wall a superior region in the midline extends downward, forming the initial incomplete separation ([[S#septation|septation]]) of the right and left atria leaving an opening the [[O#ostium primum|ostium primum]]. This initial structure partially breaks down forming the [[O#ostium secundum|ostium secundum]] and later fuses with the [[S#septum secundum|septum secundum]]. Note that complete functional and anatomical separation of the right and left atria occurs after birth with activation of the pulmonary system. |
Revision as of 23:12, 6 August 2010
Terms
ostium primum - (primary opening, first opening) In early heart development during atrial septation, the initial septum primum is incomplete leaving this initial opening between the left and right atria. Later the septum primum begins to degenerate forming a second opening, the ostium secundum.
septum primum - (primary septum) In early heart development in the atrial wall a superior region in the midline extends downward, forming the initial incomplete separation (septation) of the right and left atria leaving an opening the ostium primum. This initial structure partially breaks down forming the ostium secundum and later fuses with the septum secundum. Note that complete functional and anatomical separation of the right and left atria occurs after birth with activation of the pulmonary system.
septum secundum - (secondary septum) In early heart development, atrial septation is completed by an atrial wall growth to the right of the initial septum primum. Note that complete functional and anatomical separation of the right and left atria occurs after birth with activation of the pulmonary system.
Source: UNSW Embryology Thanks to the late Prof William Larsen for allowing permission to use animations based on images from his textbook. (More? movie technical information)
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Cite this page: Hill, M.A. (2024, April 18) Embryology Development Animation - Heart Atrial Septation. Retrieved from https://embryology.med.unsw.edu.au/embryology/index.php/Development_Animation_-_Heart_Atrial_Septation
- © Dr Mark Hill 2024, UNSW Embryology ISBN: 978 0 7334 2609 4 - UNSW CRICOS Provider Code No. 00098G