The two semilunar valves, the pulmonary and aortic valves, are closed, preventing backflow of blood into the right and left ventricles from the pulmonary trunk on the right and the aorta on the left.
Pathogens generally invade the body, in their invasion they can duplicate and cause confusion such as hijacking your cells, thus they cause infection and disease. Some of these pathogens are spread through air, sweat, blood, excrete (urine/feces), or general human contact with anything concealing the pathogen.
The characteristic which
is not in the multi-party system is dictatorship.
<span>A multi-party system is a
system of government related to politics in which there are more than two
parties have a chance to rule and get real political power. There is an option
for parties either they want to rule on their own or they become a part of
federation government.</span>
