1. Circulatory system labeling and function: pulmonary artery (X), pulmonary vein (Y), aorta (Z), comparison of artery and vein structures, oxygenated vs deoxygenated flow

2. Mental health statistics: highest female risk in 2008, biggest gender difference in 2008, ratio analysis, causes for increased risk, symptoms of depression and schizophrenia, drug impact on mental health

3. Nervous system and synapses: pathway from receptors to motor neurones, neurotransmitter release across synapse, signal transmission, impulse speed calculation over 5 minutes

4. Nutrient testing in food: iodine for starch, Biuret for protein, Benedict’s for sugar, safe handling with heat and chemicals, analysis of food types based on test outcomes

5. Ear anatomy and hearing: identification of ossicles and eardrum, pinna′s function to direct sound waves, hearing frequency decline with age, experimental design evaluation and improvement

6. Vitamin C and antioxidants: free radicals damaging DNA, vitamin C as antioxidant protecting cells, boiling reduces vitamin C levels, DCPIP method to compare vitamin C in fresh vs boiled juice