alexa Blood Vessels that Groove the Skull | Open Access Journals
ISSN: 2161-0940
Anatomy & Physiology: Current Research
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Blood Vessels that Groove the Skull

Ali Sultan Al-Refai*

Anatomy Branch, Department of Oral & Maxillofacial Surgery, College of Dentistry, Hawler Medical University, Erbil, Kurdistan Region of Iraq

*Corresponding Author:
Ali Sultan Al-Refai
Anatomy Branch, Department of Oral & Maxillofacial Surgery
College of Dentistry, Hawler Medical University
Erbil, Kurdistan Region of Iraq
Tel: +330466218256
E-mail: [email protected]

Received date: December 31, 2015 Accepted date: January 06, 2016 Published date: January 11, 2016

Citation: Al-Refai AS (2016) Blood Vessels that Groove the Skull. Anat Physiol 6:195. doi: 10.4172/2161-0940.1000195

Copyright: © 2016 Al-Refai AS. This is an open-access article distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited.

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Blood vessels; Skull; Cardiovascular system

Short Commentary

The cardiovascular system is the first system to form and function in an embryo, and the heart is the earliest differentiating and functioning organs.

The human heart develops on day 18 or 19 following fertilization [1]. On the day 22, the primitive heart tube develops into five distinct unpaired regions and begins to pump blood. Between days 23 and 28, the primitive heart tube elongates unevenly, twisting and folding to form a U-shape and then an S-shape. As a result, the atria and ventricles of the future [2].

In human embryos the heart begins to beat at about 22-23 days from conception, with blood flow beginning in the 4th week [3].

The Skull is a unique skeletal structure in several ways: embryonic cellular origin (neural crest), form of ossification (intramembranous and endochondrial) and flexibility (fibrous sutures). The cranial vault (which encloses the brain) bones are formed by intramembranous ossification. While the bones that form the base of the skull are formed by endochondrial ossification. The bones enclosing the brain have large flexible fibrous joints (sutures) which allow firstly the head to pass through the birth canal and secondly postnatal brain growth. In humans, ossification continues postnatally, through puberty until mid-20’s and in old age the sutures separating the vault plates are often completely ossified.

The continuous embryonic heart beating may lead to indentation in the soft skull bones early in life and as a result to this, grooves may developed in certain regions like occipital artery (medial to the mastoid process), deep temporal arteries (at the infratemporal crest), middle temporal artery (at the root of zygomatic arch), middle meningeal vessels (at greater wings of the sphenoid within the cranial cavity), and internal carotid artery (at the side of the body of the sphenoid within the cranial cavity). Regarding the venous sinuses, (like transverse sinus, sigmoid sinus, superior sagittal sinus), also grooved the skull bones early in life as a result of continuous heartbeat, because the blood in embryo is completely oxygenated.


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