1. Draw a basic diagram of the skin. Your diagram should include the following: Epidermis, dermis subcutaneous tissue, nerve, vein, artery, sweat glands, hair follicles, hair shaft, erector muscle, sweat
pores, melanocytes, connective tissue and muscle.

If a molecule with a molecular formula of c13h18 is treated with an excess of h2 in the presence of finally divided pt metal under conditions required for maximum hydrogenation of the molecule to give a molecule with a formula c13h24, how many rings are in the molecule?