Which cell types are present in the human body? Red blood cells skeletal muscle cells epidermal (skin) cells nerve ceils endothelial celts plining blood vessels) cardiac muscle cells An organism must be able to reproduce in order to be considered 'living! True False Electrolytes (sodium Nat, calcium Cat+, potassium Kt , chleride CH -) are required in the human body for which metabolic process(es)? producing urine electrical activity in neurons maintaining water volume in blood muscle contraction skeletal muscle cells. epidermal (skin) cells nerve cellis endothelial cells (lining blood vessels) cardiac muscle cells .