Page 22 - Science Class 07

Ruminants : Animals that feed on grass plants or which can digest cellulose
Rumination : The process of feeding and chewing the cud, in animals

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i Almost all the animals are heterotrophs.
i The heterotrophs are usually free living and hence have holozoic mode of nutrition, i.e., feed
on solid organic matter.
i The pancreas is a long, flat gland that lies in the abdomen behind the stomach.
i There are four types of teeth—incisors, canines, premolar and molar.
i Tongue has four distinct types of taste buds which help us to taste the food.

i Food is temporarily stored in stomach.
i A type of digestion which takes place within the cell is called intracellular digestion.
i Grass eating animals are called ruminants. They have four chambers in their stomach
namely rumen, reticulum, omasum and abomasum.

i In the rumen, bacteria and other micro-organisms act upon the food. Thereafter, this food is
sent to the next chamber called reticulum.

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A. Tick (3) the correct op on.
1. Animals are called:
(a) producers (b) consumers
(c) decomposers (d) none of these

2. Which of the following process is related to the distribu on of nutrients?
(a) Inges on (b) Absorp on

(c) Assimila on (d) Eges on
3. Which of the following types of teeth are used for cu ng and bi ng food materials?
(a) Incisors (b) Canines

(c) Premolars (d) Molars
4. What is the process of obtaining food in amoeba called?
(a) Assimila on (b) Eges on

(c) Phagocytosis (d) Pseudopodia
5. In ruminants, the half chewed grass reaches the first chamber of the stomach called:
(a) Reticulum (b) Rumen

(c) Abomasum (d) Omasum

22 Science-7