Match the items of Column I with suitable items in Column II
Column I Column II
(a) Salivary gland (i) Bile juice secretion
(b) Stomach (ii) Storage of undigested food
(c) Liver (iii) Saliva secretion
(d) Rectum (iv) Acid release
(e) Small intestine (v) Digestion is completed
(f ) Large intestine (vi) Absorption of water
(vii) Release of faeces
Column I Column II
(a) Salivary gland (iii) Saliva secretion
(b) Stomach (iv) Acid release
(c) Liver (i) Bile juice secretion
(d) Rectum (ii) Storage of undigested food
(e) Small intestine (v) Digestion is completed
(f ) Large intestine (vi) Absorption of water
1. Salivary glands: The salivary glands present in mammals are exocrine glands which produces saliva that contains salivary amylase enzyme through a system of ducts. Humans contain three paired major salivary glands (parotid, submandibular, and sublingual), a pair of seromucous tubarial glands and as well as various minor salivary glands.
2. Stomach: Stomach is a muscular organ located on the left side of the upper abdomen and it stomach receives food from the oesophagus through the buccal cavity. As food reaches the end of the oesophagus, it enters to the stomach which secretes acid and various enzymes that helps in the digestion of food.
3. Liver: The liver is the largest gland that only found in vertebrates which detoxifies various metabolites, synthesizes proteins and produces biochemical substances which are necessary for digestion and growth. In humans, it is located in the right upper part of the abdomen.
4. Rectum: The rectum is a chamber that starts at the end of the large intestine, immediately continues the sigmoid colon, and ends at the anus. The rectum is empty because stool is stored higher in the descending colon.
5. Small Intestine: The small intestine is an organ in gastrointestinal tract where most of the end of absorption of nutrients and minerals from food takes place. It is present between the stomach and large intestine, and it receives bile and pancreatic juice through the pancreatic duct for the digestion of complex substances.
6. Large Intestine: The large intestine is shorter than the small intestine and is the last part of the gastrointestinal tract and of the digestive system in vertebrates. Water is absorbed in the large intestine and the remaining waste material is stored as faeces before the elimination or by defecation.
7. Anus: The anus is the opening where the gastrointestinal tract ends and exits from the body. The anus starts at the bottom part of the rectum and is the last portion of the colon i.e. large intestine. The anorectal line helps in the separation of the anus from the rectum.
Popular Questions of Class 7 Science
- Q:-
Classify the changes involved in the following processes as physical or chemical changes:
(a) Photosynthesis
(b) Dissolving sugar in water
(c) Burning of coal
(d) Melting of wax
(e) Beating aluminium to make aluminium foil
(f ) Digestion of food - Q:-
Given below is a crossword puzzle based on this lesson. Use hints to fill in the blank spaces with letters that complete the words.
Down Across
(D) 1 : Thorough washing (A) 1 : Keeps warm
2 : Animal fibre 2 : Its leaves are eaten by silkworms
3 : Long thread like structure 3 : Hatches from egg of moth
- Q:-
Sketch the cross section of soil and label the various layers.
- Q:-
Take three test-tubes. Fill æth of each with water. Label them A, B and C. Keep a snail in test-tube A, a water plant in test-tube B and in C, keep snail and plant both. Which test-tube would have the highest concentration of CO2?
- Q:-
Here is a crossword puzzle: Good luck!
Across
3. Liquid waste products
4. Solid waste extracted in sewage treatment
6. A word related to hygiene
8. Waste matter discharged from human bodyDown
1. Used water
2. A pipe carrying sewage
5. Micro-organisms which causes cholera
7. A chemical to disinfect water - Q:-
Sketch the reproductive parts of a flower.
- Q:-
Solve the following crossword puzzle with the clues given:
Across
2. Plantation prevents it.
5. Use should be banned to avoid soil pollution.
6. Type of soil used for making pottery.
7. Living organism in the soil.Down
1. In desert soil erosion occurs through.
3. Clay and loam are suitable for cereals like.
4. This type of soil can hold very little water.
5. Collective name for layers of soil. - Q:-
Describe how crystals of copper sulphate are prepared.
- Q:-
Match the items in Column I with those in Column II:
Column I Column II
(i) A home for living organisms (a) Large particles
(ii) Upper layer of the soil (b) All kinds of soil
(iii) Sandy soil (c) Dark in colour
(iv) Middle layer of the soil (d) Small particles and packed tight (v) Clayey soil (e) Lesser amount of humus - Q:-
When baking soda is mixed with lemon juice, bubbles are formed with the evolution of a gas. What type of change is it? Explain.
Recently Viewed Questions of Class 7 Science
- Q:-
Will the compass needle show deflection when the switch in the circuit shown by Fig.14.24 is closed?
- Q:-
Classify the changes involved in the following processes as physical or chemical changes:
(a) Photosynthesis
(b) Dissolving sugar in water
(c) Burning of coal
(d) Melting of wax
(e) Beating aluminium to make aluminium foil
(f ) Digestion of food - Q:-
Explain why rusting of iron objects is faster in coastal areas than in deserts.
- Q:-
Consider the following statements:
(a) Both acids and bases change colour of all indicators.
(b) If an indicator gives a colour change with an acid, it does not give a change with a base.
(c) If an indicator changes colour with a base, it does not change colour with an acid.
(d) Change of colour in an acid and a base depends on the type of the indicator.Which of these statements are correct?
(i) All four (ii) a and d (iii) b and c (iv) only d - Q:-
Can we survive only on raw, leafy vegetables/grass? Discuss.
- Q:-
State the main difference between asexual and sexual reproduction.
- Q:-
Mark ‘T’ if the statement is true and ‘F’ if it is false:
(a) The freshwater stored in the ground is much more than that present in the rivers and lakes of the world. (T/F)
(b) Water shortage is a problem faced only by people living in rural areas. (T/F)
(c) Water from rivers is the only source for irrigation in the fields. (T/F)
(d) Rain is the ultimate source of water. (T/F) - Q:-
In Fig. 17.15, the artist has forgotten to put the labels and directions on the arrows. Mark the directions on the arrows and label the diagram using the following labels:
clouds, rain, atmosphere, carbon dioxide, oxygen, plants, animals, soil, roots, water table.
- Q:-
Mark ëTí if the statement is true and ëFí if it is false:
(a) Digestion of starch starts in the stomach. (T/F)
(b) The tongue helps in mixing food with saliva. (T/F)
(c) The gall bladder temporarily stores bile. (T/F)
(d) The ruminants bring back swallowed grass into their mouth and chew it for some time. (T/F) - Q:-
Which of the following distance-time graphs shows a truck moving with speed which is not constant?
- NCERT Chapter