Feeling of thirst is due to

The $Facial$ nerve is:

$I.$ The endocrine system provides chemical integration through hormones.
$II.$ The neural system provides an organized network of point-to-point connections for quick coordination.
$III.$ The neural organization is very complex in lower invertebrates.
$IV.$ The human neural system includes $CNS$ and $PNS$.
Select the correct statements.

Draw labelled diagrams of the following:
$(a)$ Neuron
$(b)$ Brain
$(c)$ Eye
$(d)$ Ear

Match the following:
Receptors | Stimuli
$A.$ Statoreceptors | $1.$ Frequencies of vibrations
$B.$ Gustatory receptors | $2.$ Hunger and thirst
$C.$ Enteroreceptors | $3.$ Taste
$D.$ Mechanoreceptors | $4.$ Equilibrium
The correct pairing sequence is:

In the eye of an insect,a mosaic image is formed in .........