In the frog's heart, there are muscular ridge | vedclass

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(D) In the frog's heart, a number of muscular ridges called $Columnae 	ext{ } carneae$ project from the wall of the ventricle into its cavity.These r

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Columnae carneae

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(D) In the frog's heart, a number of muscular ridges called $Columnae 	ext{ } carneae$ project from the wall of the ventricle into its cavity.These ridges divide the peripheral part of the ventricular cavity into a number of small pockets.They prevent the suction effect that would occur with a flat-surfaced membrane, thereby ensuring the heart pumps blood efficiently.

$P$. Frog on land	$I$. Cutaneous respiration
$Q$. Frog in water	$II$. Pulmonary respiration
$R$. Frog during aestivation and hibernation	$III$. Buccopharyngeal respiration

In the frog's heart, there are muscular ridges which consist of fibers called

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