Myogenic.

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When the intiation and further regulation of heartbeats take place in the muscles,then such a heart is called myogenic
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Study the following and identify the incorrect statements (i) Muscles of iris and ciliary body are smooth muscles of mesodermal origin (ii) Slow and sustained involuntary contraction of smooth muscles are called spasms (iii) Quiescent mononucleate myogenic cells of skeletal muscles are called pericytes (iv) Skeletal muscles fibre is multinucleate and is a syncytium

Rrog's heart when taken out of the body continues to beat for sometime. Select the best option from the following statements. (a) Frog is poikilotherm (b) Frog does not have any coronary circulation (c ) Heart is "myogenic" in nature (d) Heart is autoexcitable