1. STUDY OF NUTRITION AND EXCRETION
Dr. Rahul B Patil
SYBSc Paper II, Unit I
Department of Zoology,
Veer Wajekar ASC College, Phunde

2. Comparative study of Nutritional apparatus
Autotrophic
Photoautotrophic: e.g. Euglena, Volvox, Bacteria
Chemoautotrophic: e.g. Bacteria, few sp. of
Chilomonos (Oxidation of Compounds)
Heterotrophic
Holozoic nutrition:
e.g. All herbivores, carnivores
and Omnivores
Saprophytic nutrition: e.g. Bacteria,
Protozoans and Fungi etc.
Parasitic nutrition: e.g. Entaoemeba, plasmodium, Mosquito, bed bug, Ascaris, etc.

3. Nutrition
Ingestion
Digestion
Absorption
Assimilation
Egestion

4. Amoeba : Food Vacuole Holozoic mode of Nutrition
Food: Bacteria, diatoms, desmids, flagellates, ciliates, rotifers etc.
Method of Feeding: Phagocytosis
Digestion: Lysosomes
Choosing Food and avoiding others: No Sense organs

5. Hydra: Gastrovascular cavity
Digestive system: Incomplete
Gastrovascular Cavity
One opening for food as well as undigested food
Tentacles : Food capturing
Gastroderm: Flagellated, amoeboid and gland cells
Gland Cells: Secrete enzymes
Type of Digestion:
Extracellular (Enzymatic digestion) and Intracellular (Phagocytosis)
Reserve Food: Fat, Glycogen

6. Earthworm: Complete Digestive System

7. Cockroach: Digestive system

8. Bivalve-Filter Feeder (Digestive System)

9. Amphioxus :Filter Feeder (Digestive System)

10. Pigeon : Digestive system

11. Ruminant stomach

12. Physiology of Digestion in Man

13. Digestion of Carbohydrates
Starch Salivary amylase Maltose
Undigested starch Pancreatic amylase Maltose
Maltose Maltase Glucose + Glucose
(Malt Sugar)
Sucrose Sucrase Glucose + Fructose
(Cane sugar)
Lactose Lactase Glucose + Galactose
(Milk sugar)

14. Digestion of Proteins Proteins, Proteoses Trypsin Polypeptide
and Peptones Alkaline medium
Polypeptides Carboxypeptidase Dipeptide
Alkaline medium
Polypeptides Polypeptidases Amino Acids + Dipeptides Alkaline medium
Dipeptides Dipeptidases Amino acids

15. Digestion of Fats Fat Bile Salts Emulsified Fat
Fat globules (Fat Droplets)
Emulsified fat Lipase Fatty acids + Glycerol

16. Comparative study of Excretory and Osmoregulatory Structures and Functions
Excretion
Osmoregulation
Comparison between Invertebrate and Vertebrates

17. Amoeba: Contractile Vacuole

18. Planaria: Flame cells

19. Earthworm: Nephridia

20. Cockroach: Malpighian tubules

21. Green gland or antennary gland of Crustaceans

22. Organ of Bojanas: Bivalve

23. Categorization of animals based on Principal Nitrogenous Excretory Products
Ammonia: Oxidative deamination

24. Categorization of animals based on Principal Nitrogenous Excretory Products
Ammonia: Non-oxidative demination

25. Categorization of animals based on Principal Nitrogenous Excretory Products
Urea

26. Categorization of animals based on Principal Nitrogenous Excretory Products
Uric Acid

27. Structure of Kidney

28. Malpighian body

29. Structure of Nephron

30. Physiology of Urine formation

31. THANK YOU