(A) In $Pheretima$ (earthworm), the circulatory system includes specialized pumping organs called hearts.There are $4$ pairs of lateral hearts.These a

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(A) In $Pheretima$ (earthworm), the circulatory system includes specialized pumping organs called hearts.There are $4$ pairs of lateral hearts.These are loop-like vessels located in segments $7, 9, 12,$ and $13$.They connect the dorsal and ventral blood vessels and help in pumping blood.

Class 11 Biology Structural Organisation In Animals Anatomy of Earthworm

Easy

How many pairs of lateral hearts are present in $Pheretima$ (in pairs)?

A
$4$
B
$8$
C
$16$
D
$12$

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Class 11 Questions

Class 11

Biology Questions

Chapter

Structural Organisation In Animals

Subtopic

Anatomy of Earthworm

Match the following and select the correct option:

Column-$I$ Column-$II$

$P$. Testes $I$. $18^{th}$ segment

$Q$. Accessory glands $II$. $17^{th}$ and $19^{th}$ segments

$R$. Male genital pore $III$. $6^{th}$ to $9^{th}$ segments

$S$. Spermathecae $IV$. $13^{th}$ segment

$T$. Ovaries $V$. $10^{th}$ and $11^{th}$ segments

Column-$I$	Column-$II$
$P$. Testes	$I$. $18^{th}$ segment
$Q$. Accessory glands	$II$. $17^{th}$ and $19^{th}$ segments
$R$. Male genital pore	$III$. $6^{th}$ to $9^{th}$ segments
$S$. Spermathecae	$IV$. $13^{th}$ segment
$T$. Ovaries	$V$. $10^{th}$ and $11^{th}$ segments