A. FILL IN THE BLANKS
*1. ....................... artery takes the deoxygenated blood to the lungs for oxygenation.
*2. ....................... is the largest gland in the body.
*3. The digested food is absorbed by the ....................... in the small intestine.
*4. Lymph flows in ....................... direction.
5. The processes that are common to all living organisms are called as the ....................... .
6. Food contains several components called as ....................... .
7. The crushed food is wetted with saliva secreted by the ....................... .
8. Food is converted into simpler molecules with the help of biological catalysts
called as ....................... .
9. The food is pushed forward in the canal due to rhythmic contraction and relaxation of the muscles of the canal called as ....................... .
10. ....................... protects the inner lining of the stomach from the action of acids under normal conditions.
11. The exit of the food from the stomach is regulated by the ....................... .
12. Carbondioxide enters into the leaves through tiny pores present on the
surface of the leaf called ...................... .
13. The heart is covered by the ......................
14. The basic filtration unit in the kidney is a cluster of thin walled blood
capillaries called as a ....................... .
15. Each nephron has a cup shaped thin walled upper end called ...................... .
16. Bowman’s capsule contains a bundle of blood capil laries cal led ...................... .
17. In some plants, waste is in the form of calcium oxalate crystals called as
....................... .
18. ....................... is the fluid connective tissue in human beings.
ANSWERS
1. Pulmonary
2. Liver
3. Villi
4. One
5. Life process
6. Nutrients
7. Salivary glands
8. Enzymes
9. Peristaltic movement
10. Mucus
11. Sphincter muscle
12. Stomata
13. Pericardial membrane
14. Nephron
15. Bowman's capsule
16. Glomerulus
17. Raphides
18. Blood
B. Choose the correct alternatives and rewrite the complete sentences
1. The organisms which synthesize their own organic food are called as
....................... .
(a) autotrophs (b) heterotrophs (c) parasites (d) saprophytes
2. Organisms that depend on other organisms for their food are .......................
organisms.
(a) autotrophic (b) heterotrophic (c) parasitic (d) saprophytic
3. The alimentary canal begins with the ....................... .
(a) stomach (b) oesophagus (c) mouth (d) small intestine
4. Enzyme ....................... breaks down starch into a simple sugar maltose.
(a) pepsin (b) salivary amylase (c) pancreatic amylase (d) trypsin
5. The enzyme ....................... digests proteins in the stomach.
(a) trypsin (b) pepsin (c) salivary amylase (d) pancreatic amylase
6. The ....................... is the longest part of the alimentary canal.
(a) stomach (b) oesophagus (c) small intestine (d) large intestine
7. Unused glucose is stored in the liver in the form of ....................... .
(a) starch (b) glycogen (c) proteins (d) fats
8. Cellular or internal respiration takes place in the ....................... of the
cells to release energy in the form of ATP.
(a) mitochondria (b) cytoplasm (c) nucleus (d) vacuoles
9. In aquatic animals ....................... are the site for uptake of dissolved
oxygen into the blood by diffusion.
(a) lungs (b) skin (c) gills (d) trachea
10. The human respiratory tract starts with the ....................... .
(a) mouth (b) larynx (c) lungs (d) nostrils
11. The process of transportation of materials in animals is cal led ...................... .
(a) assimilation (b) translocation (c) circulation (d) absorption
12. Human heart weighs about .......................
(a) 500 gm (b) 360 gm (c) 1000 gm (d) 250 gm
13. In plants, the gaseous excretory materials are eliminated by ....................... .
(a) transpiration (b) diffusion (c) osmosis (d) translocation
A. Answers
1. Autotrophs
2. Heterotrophic
3. Mouth
4. Salivary amylase
5. Pepsin
6. Small intestine
7. Glycogen
8. Mitochondria
9. Gills
10. Nostrils
11. Circulation
12. 360 gm
13. Diffusion
