Objective: The blood supply of the heart is provided by the right and the left coronary arteries. The right coronary arises from the anterior aortic sinus and the left coronary arises from the left posterior aortic sinus of the ascending aorta. These arteries and their branches anastomose with each other but the anastomoses are not sufficiently large to maintain a collateral circulation. Variations of these branches do not have a determinable pattern, so this investigation was done to establishing and recognizing the variations of coronary arteries. Methods: This investigation was carried out on 40 adult human hearts of fixed Iranian male cadavers, with approximate age of 40-80 years. Dissecting tools used to remove the pericardium in order to expose the coronary arteries and their branches, for observing any kind of variations. The origin of both right and left coronary arteries had no variation. Results: In 2 cases (5%), the right marginal artery was absent. The blood supply of the heart in 92.5% of cases was right dominant, but in only7.5% was left dominant. We observed that in 90% of cases the anterior interventricular artery ran on the diaphragmatic surface to anastomose with the posterior interventricular artery, in only two cases, the left marginal artery was absent, however in these cases the diagonal artery had more branches than the others.Conclusion: Variations of coronary arteries do exist, but they are generally asymptomatic, there is no official reference offered and no acceptable pattern of such variations presented either. In spite of the technological development in dissection and study of angiography and surgical myocardial revascularization, the variations of the coronary arteries must be taken under consideration.

Introduction: To improve anatomical atlases, we tried to create a printable 3D atlas of rabbit's anatomy based on the Anaglyph.Methods: In this study, twenty white rabbits euthanized and dissected. All 3D images were reconstructed by means of "stereo photo maker (SPMÒ)" software.Results: By this atlas, users can easily understand nomenclature, the topography and, certainly, the transposition of the anatomical structures in each image even if they are not at the dissecting room.Conclusion: The novelty of this atlas may encourage students to spend more time and concentrate on the material more as opposed to the classical atlases, thereby, leading to better understanding of anatomy. It is worth mentioning that this atlas has been prepared as an example for other works.

Background & Aim: Salvia macrosiphon is one of the important species of Salvia which belongs to the Lamiaceae family. All 58 Iranian species of Salvia grow in different ecological places. The aim of this research is the investigation of morphological and anatomical characteristics of S. macrosiphon.Experimental: The above–mentioned species were collected from Zavarijan and Dodangeh region in Borojerd in 2007, and were transferred into a suitable place and then they have been determined systematically and they were used for morphological and anatomical studies by using light microscope.Results & Discussion: The investigation shows the species are mostly similar to the other ones previously studied anatomically. There were many trichomes in epidermal layer of stem. There are also anantomically different bundle sheath in pedicles which is three in middle and two in surrounding area in S. macrosiphon. The collenchyma tissues were observed in corners of stem. Parenchyma cells have chloroplasts and there are also many trichomes in the surface of leaves which seems many of them are secretary.Industrial and practical recommendations: The usage of the extract of different species of Saliva macrosiphon in medicinal and food products and its biological activity totally depends on the chemical compounds of extract. So, according to the importance of these extracts, doing some extensive research on all Iranian species is recommended.