In Egypt, ancient mummies can be found to have their arteries intact due to well preserved:

In ancient Egyptian mummies, arteries are often found remarkably intact due to the high preservation of elastic fibres. Arteries naturally possess thick, elastic walls to withstand high blood pressure from the heart. During the mummification process, whether natural or artificial, tissues with high connective tissue content tend to show superior preservation compared to internal organs like the kidneys or CNS [1]. Elastic fibres, which form the internal and external elastic laminae of arterial walls, are highly resistant to decomposition and chemical degradation. Histological studies of mummified soft tissues often utilize specific stains like 'elastica van Gieson' to identify these preserved structures. While other organic materials generally decompose [1], the structural integrity of the arterial system is maintained by these resilient elastic components, allowing paleopathologists to study ancient vascular conditions.

Sources

1. [1] Science , class X (NCERT 2025 ed.) > Chapter 5: Life Processes > The tubes – blood vessels > p. 93