Question

Shyam does not brush his teeth.He eats chocolates and toffees.He is also fond of noodles.One day he suffers with tooth ache. Shyam’s father takes him to a dentist. The dentist explains, reasons for the pain in the tooth. Shyam comes home and takes out his biology book and reads the topic dental caries.If the teeth are not cleaned regularly, they become covered with a sticky yellowish layer W of food particles and bacteria. Since layer W covers the teeth, the alkaline liquid X secreted by glands Y inside the mouth cannot reach the teeth surface to neutralize the acid formed by the action of organism Z on sugary food, and hence tooth decay sets in.

$\green {\mathfrak{On \: the \: basis \: of \: above } \: \: \: \: \huge{information, \: answer \: the \: following \: question:}}$
$\mathbb{a)What is W known as?\ \textless \ br /\ \textgreater \ b) What are X and Y?\ \textless \ br /\ \textgreater \ c) What are organism Z?\ \textless \ b\textgreater \ d) State one way of removing layer W from the teeth.}$ ​

Answer 1

Answer:

W - plaque

X - Saliva

Y - salivary glands

Z - bacteria

Answer 2

Explanation:

plaque

salvia

salvia gland

bacteria