What Is the Correct Sequence in Which a Drop of Blood

question 80

Multiple Choice

What is the correct sequence in which a drop of blood returning from the body encounters the heart valves?

• A)right atrioventricular valve \(\rightarrow\) aortic semilunar valve \(\rightarrow\) left atrioventricular valve \(\rightarrow\) pulmonary semilunar valve
• B)right atrioventricular valve \(\rightarrow\) pulmonary semilunar valve \(\rightarrow\) left atrioventricular valve \(\rightarrow\) aortic semilunar valve
• C)left atrioventricular valve \(\rightarrow\) pulmonary semilunar valve \(\rightarrow\) right atrioventricular valve \(\rightarrow\) aortic semilunar valve
• D)pulmonary semilunar valve \(\rightarrow\) left atrioventricular valve\(\rightarrow\)aortic semilunar valve \(\rightarrow\) right atrioventricular valve
• E)left atrioventricular valve \(\rightarrow\) aortic semilunar valve \(\rightarrow\)right atrioventricular valve \(\rightarrow\) pulmonary semilunar valve

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Definitions:

Placenta

A specialized organ in mammals that connects the developing fetus to the uterine wall to allow nutrient uptake, waste elimination, and gas exchange via the mother's blood supply.

Zygote

The initial cell formed when a sperm cell fertilizes an egg cell, marking the beginning of embryonic development.

Embryo

An early stage of development in multicellular organisms, in humans referring to the stage after fertilization up to the end of the eighth week of gestation.

Fetus

A developing human from roughly eight weeks after conception until birth.