vitamin
any of a group of organic substances essential in small quantities to normal metabolism
mineral
solid homogeneous inorganic substances occurring in nature having a definite chemical composition
protein
any of a large group of nitrogenous organic compounds that are essential constituents of living cells; consist of polymers of amino acids; essential in the diet of animals for growth and for repair of tissues; can be obtained from meat and eggs and milk and legumes
hormone
the secretion of an endocrine gland that is transmitted by the blood to the tissue on which it has a specific effect
digestion
the organic process by which food is converted into substances that can be absorbed into the body
fat
a soft greasy substance occurring in organic tissue and consisting of a mixture of lipids (mostly triglycerides)
bone
rigid connective tissue that makes up the skeleton of vertebrates
obesity
more than average fatness
respiration
a single complete act of breathing in and out
muscle
animal tissue consisting predominantly of contractile cells
