You listen to the heart beating and you hear a "lub-swish- dup".

The swish is caused by:

Select one:

a. A leaky semilunar valve

b. A leaky mitral valve

c. A stenoic mitral valve

d. Closing of the AV valves

According to subpart d, research with children may be eligible for exemption when: the children will be asked to complete a surveythe research involves the use of educational teststhe children will be interviewed by the researcher. the research with children will involve participant observation with researcher interaction.

Why was new orleans destined to be the center of slave trade in the southern united states

Under the us constitution, some powers belong to the states. choose the power that belongs to the states.