The document discusses several topics related to human biology including: experiments that demonstrate chlorophyll and carbon dioxide are essential for photosynthesis, the human digestive system and its alimentary canal and digestive glands, tooth decay caused by bacteria producing acids that attack tooth enamel leading to cavities, breakdown of glucose by various pathways, the human respiratory system, and the mechanisms of inhalation and exhalation in breathing.

13. Experiments.
1.To Demonstrate chlorophyll is essential for
photosynthesis
2.To Demonstrate carbon dioxide is essential
for photosynthesis

18. HUMAN digestive system:
1. Alimentary canal
2. Digestive Glands

34. Tooth decay (dental caries) is damage to a tooth that can
happen when decay-causing bacteria in your mouth make
acids that attack the tooth's surface, or enamel. This can
lead to a small hole in a tooth, called a cavity. If tooth
decay is not treated, it can cause pain, infection, and even
tooth loss.

36. Breakdown of glucose by various pathways

39. HUMAN RESPIRATORY
SYSTEM :

42. MECHANISM OF BREATHING
Breathing in air is called
inhalation and breathing out
air is called exhalation.

83. thank you
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