Heart valves
(hematoxylin and eosin)
Heart valves:
- develop like an endocardial duplication, their surface is covered with vascular endothelium;
- the base of the valves is formed by dense connective tissue containing collagen and elastic fibers and having no blood vessels;
- the bases of the valves are attached to fibrous rings.
On a section cutted through the base of the rabbit's heart presented structural components of the ventricular-vascular (aortic) and atrioventricular (mitral) valves.
Aortic valve separates the lumen of aorta from the cavity of the left atrium (two of the three flaps got into the section):
A bicuspid (mitral) valve separates the lumen of the left atrium from the left ventricle: