Scurvy is a disease caused by deficiency and lack of vitamin C and absorbic acids within the system and is particularly prelevant in children still and was so in Victorian sailors. As the sailors went long periods existing without vitamin C in their diet with the inevitable consequence eventually staples such as lemons and limes for the sailors to suck and thus consume their natural goodness were added to the diets of all ships of the time.
Marasmus is a form of emaciation and wasting in an infant due to protein-energy malnutrition. It is characterized by growth retardation in weight more than height so that the head appears quite large relative to the body.