Morphological studies of the coronary arteries of the mule

ABSTRACT

The present study was carried out on the hearts of 6 adult mules. The specimens were injected by red latex through the right and left coronary arteries. The left and right coronary arteries arise from the left and right corresponding aortic sinus of the ascending aorta. The pattern of the coronary artery is bilateral coronary type. The left coronary artery supplies the auricular surface and most proximal caudal part of the atrial surface of the heart, while the remaining part was supplied by the right coronary artery. No anastomoses was observed between both left and right coronary arteries. The R. coni arteriosi and R. proximalis ventricularis dexter arise by a common stem of A. coronaria dextra. The M. papillaris magnus of the right ventricle was supplied by R. proximalis ventricularis dexter, while M. papillaris subarteriosus was supplied by R. collaterales of R. interventricularis paraconalis. In addition, R. septalis of the R. interventricularis subsinosus supplies mainly M. papillaris paravea of the right ventricle. In left ventricle, M. papillaris auricularis was supplied by R. collateralis proximalis sinister and R. proximalis ventricularis sinister. As well, M. papillaris subatrialis was supplied by R. collateralis ventricularis sinister of the R. interventricularis subsinosus