Which item is incorrect regarding the heart? A. it has 2 \"ends\" (likea patella

Question

Which item is incorrect regarding the heart?

A. it has 2 "ends" (likea patella), 3 layers, 4 chambers, 3 named surfaces, and one named border

B. during most of ventricular systole, the right and left atrioventricular valves are in the closed position and the aortic and pulmonary valves are in the open position

C.heart valves are phycially opened and closed by blood: blood flowing through a valve in the anatomically "correct" direction keeps the valve in the open position and blood flowing the "wrong" way through a valve forces its "flaps" to close

D. the term "cusp" techinically refers to one of the flaps of the aortic or pulmonary valve, but is often used in reference to those of an atrioventricular valve as well- even though the latter are more properly called leaflets (= valvulae)

E. the outer layer of the heart wall (epicardium= visceral layer of the serous pericardium) and the inner layer (endocardium) are very thin

Explanation / Answer

A option is incorrect regarding heart

Heart has 2 ends namely an apex directed, forward s and to the left itiis formed entirely by left ventricle t and the base directed backwards formed mainly by left atrium and small part of right atrium.

Heart has 4 chambers namely right atrium, right ventricle,left atrium,left ventricle.

There are 2 surfaces of heart and not 3

the anterior or sternocostal surface is formed mainly by right ventricle and right atrium and partly by left ventricle and left auricle.

The inferior or diaphragmatic surface that rest on the the central tendon of diaphragm.it s left 2/3,rd is formed by left ventricle and right ventricle forms its right 1/3rd part.

There are 4 border s and not 1 border

The upper border which is formed by 2 atria mainly left atrium

The right border which os formed of right atrium

The inferior border mainly formed by right ventricle a small part of it is formed by right ventricle

The left border that is mainly formed by left ventricle and partly by left auricle.

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