The document discusses plant excretion and metabolism. It explains that plants excrete most waste through stomata by diffusion. Nitrogenous waste is converted to insoluble granules inside plant cells. Some excretory products like oils can be used to make perfumes. The document also lists several useful excretory products from plants that are used to make ink, varnish, gum, quinine, and essential oils. It concludes with some harmful excretory products like caffeine, nicotine, opium, and cocaine.

1. PLANT EXCRETION

2. PLANT METABOLISM
 Photosynthesis
 Respiration

3. EXCRETORY PRODUCTS OF PLANTS
 Most of the waste products
produced by plants are excreted
mainly by simple
diffusion through the stomata.
 Nitrogenous wastes are mostly
converted into insoluble granules
which are kept within the plant
cells.
 Waste products in the form of oil
droplets can be used to make
perfumes and aromatic oils.

4. USEFUL EXCRETORY PRODUCTS

5. TANNIN – BARK OF PLANTS
MAKE INK

6. CASUARINA TREE – RESIN
MAKE VARNISH & GUMS

7. ACACIA TREE
MAKE GUM FOR COUGH MEDICINE

8. QUININE – BARK OF TREE
MALARIA MEDICINE

9. ESSENTIAL OILS
MAKE PERFUME

10. HARMFUL EXCRETORY PRODUCTS

11. CAFFEINE - COFFEE

12. NICOTINE -TOBACCO

13. OPIUM – POPPY PLANT - MORPHINE

14. COCAINE – COCO PLANT