Study the diagram given below and then answer the questions that follow:

(a) Name the parts labeled 1, 2, 3, 4, 5 and 6.
(b) Identify the tooth and give a reason to support your answer.
(c) Describe the structure of the part labeled '3'.
(d) Give the total number of the type of tooth mentioned in '1' above, in the mouth of an adult and state its function.

Study the following dental formula and then answer the questions that follow:

$i\dfrac{3}{4} \enspace c\dfrac{0}{0} \enspace pm\dfrac{0}{1} \enspace m\dfrac{1}{1}$

(a) What is the total number of teeth in the (i) upper jaw and (ii) lower jaw?

(b) State the total number of teeth present in the dentition.

(c) Give the dental formula of an adult human being.

Draw a neat diagram of the "Microscopic Structure of an intestinal villus" and label the parts given below :

1. Epithelium
2. Capillaries
3. Lacteals

Answer the following questions :

(a) What is the advantage of having a large number of villi on the inner surface of small intestine ?

(b) Write the important role of lacteals.

(c) Name the juice secreted from the glandular cells of small intestine.

(d) Name the specific secretions of:

1. Salivary gland
2. Stomach
3. Liver
4. Pancreas

Write the correct word for the items (i) to (viii).

(i) A predator:

$\boxed{\text{GRIET}} \quad$ ……………

(ii) Deficiency of Folic acid (B₉) produces:

$\boxed{\text{MIAAAEN}} \quad$ ……………

(iii) A digestive enzyme:

$\boxed{\text{ENPISP}} \quad$ ……………

(iv) A part of tooth:

$\boxed{\text{TEEDINN}} \quad$ ……………

(v) Fatty acids are absorbed into:

$\boxed{\text{TACLELAS}} \quad$ ……………

(vi) Maltase acts on:

$\boxed{\text{LESOMAT}} \quad$ ……………

(vii) Excess amino acids are broken down in:

$\boxed{\text{RIVEL}} \quad$ ……………

(viii) An enzyme which digest starch:

$\boxed{\text{YEALMAS}} \quad$ ……………