1 NEURON

2 MYELIN SHEATH

3 SYNAPSE

4 BRAIN

5 EYE

6 FORMATION OF IMPULSE IN PHPTORECEPTORS

7 HORMON IN TARGET CELL

8 PANCREAS

8 ADRENAL GLAND

9 PITUITARY GLAND

10 BODY SECRETIONS AND DEFENSE

11 PHAGOCYTOSIS

12 NUCLEOTIDE

13 ACTIONS OF GENES

14 PRODUCTION OF INSULIN -GENETIC ENGINEERING

15 CHEMICAL EVOLUTION