Fill in the blanks using the words listed below.

water, front, intestinal, salts, pseudopodia, back, vacuole

(a) The digestion of all food components is completed by the ____________ juice.

(b) Large intestine absorbs ___________ and some __________ from the undigested food.

(c) Tongue is attached at the _____________ to the floor of the mouth cavity and is free at the _____________.

(d) Amoeba pushes out _____________ around the food and traps it in a food _____________.

Ruminants such as cows and buffaloes swallow their food hurriedly and then sit restfully and chew their food. Can you reason why?

Boojho and Paheli were eating their food hurriedly so that they could go out and play during the recess. Suddenly, Boojho started coughing violently. Think of the reasons why he was coughing and discuss with your friends.

Label the below given Figure 2.1 as directed below in (i) to (iv) and give the name of each type of teeth.

(i) The cutting and biting teeth as ‘A’

(ii) The piercing and tearing teeth as ‘B’

(iii) The grinding and chewing teeth as ‘C’

(iv)The grinding teeth present only in adult as ‘D’

Read the following passage carefully and answer the questions that follows it. Bile juice is stored in a sac called, gall bladder, located near its organ of secretion, liver. The gall bladder releases the bile juice into the small intestine whenever food reaches there. Though bile juice is devoid of any digestive enzymes, it is required for the digestion of fats. The fats cannot be digested easily because they are insoluble in water and are present as large globules. Bile juice breaks down big fat droplets into smaller droplets. These are then easily digested by the enzymes released from the pancreas.

(a) Which organ secretes the bile juice?

(b) Why is digestion of fats difficult as compared to that of other nutrients?

(c) How does bile juice help in digestion of fat?

(d) Where is the digestion of fat completed?

(e) Does bile juice digest fat completely?