Biology, asked by then091987, 5 hours ago

Though the heart is auto excitable, its
function can be moderated by
O
Neural mechanism only
O Neural and hormonal mechanism
Hormonal mechanism only
By only nodal tissue (SAN and AVN)​

Answers

Answered by santernarwal33
0

Answer:

by only nodal tissue

Explanation:

because it consist of smooth muscles and they are not coordinated by brain and nerous system

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