Vena cava, right atrium, tricuspid valve, right ventricle, pulmonary semi-lunar valve, pulmonary trunk, pulmonary arteries, lungs, pulmonary veins, left atrium, mitral valve, left ventricle, aortic semi-lunar valve, aorta.
See links below:
See the related link.
valves
The heart has a series of valves. They are the mitral, aortic, tricuspid, and pulmonary.
Skeletal muscles squeeze the lymph through lymph vessels. Valves in the vessels prevent backflow
caused by blood flowing through the chambers and valves of the heart or the blood vessels near the heart. Sometimes anxiety, stress, fever, anemia, overactive thyroid, and pregnancy will cause innocent murmurs
The heart does not have doors, but it does have valves that could be thought of as doors. They consist of the semilunar valves (the pulmonary semilunar valve and the aortic semilunar valve). The other two are the atrioventricularvalves (tricuspid and bicuspid valves).
Capillaries do not have valves. Veins are the blood vessels with valves.
The "little door" refers to the valves that are present throughout the venous blood vessles, and in the heart chambers. They prevent blood from flowing the wrong way in the vessels.
The endothelium is the medical term meaning lining of the blood vessels, including those of the heart. It is continuous with the endocardium, the inner lining of the heart chambers and heart valves.
Veins, arteries or valves
A normal echocardiogram shows a normal heart structure and the normal flow of blood through the heart chambers and heart valves
Valves are in the veins.
If you mean the milk ducts, no, they have no valves. The lymph vessels do. All lymph vessels everywhere in the body do.