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please answer all three please thabk you!!
Question 13 The trachea is suspended superiorly by the: Not yet answered Marked out of 2.00 P Flag question Select one: O a.c
What is occurring in between the S1 and 52 heart sounds? Select one: a Ventricular systole b. Atrial systole c. Ventricular d
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Answer #1

CIRCOID CARTILAGE- this forms the inferior wall of the larynx and it is attached to the top of the trachea.

AUTORYTHMICITY- is the property to of producing its own electrical rhythm. the heart cells and neurons have this property but not skeletal muscles, they should reply on the external impulses fro them to get excited and cause any action in them.

the other 3 are important features of skeletal muscles, they should have stretchability property (extensibility), able to contract to cause action (contractability) and excitability (that is to get excited by external stimulus)

VENTRICULAR SYSTOLE- occurs between the S1 and S2 heart Sound. first heart sound occurs when the mitral and tricuspid valves close, S2 occurs when the aortic and pulmonary valve closes, between these two occurs the ventricular systole.

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