storage form of carbohydrates in humans
GLYCOGEN
protein fiber that provides tensile strength in hard tissues
COLLAGEN
organelle that contains proteolytic enzymes
LYSOSOME
colloid-containing gland responsible in producing calcitonin
THYROID
shape of nucleic acids
HELIX
examples are stomach, uterus and gallbladder
HOLLOW ORGANS
biomolecule known as the body’s building block
PROTEIN
portion of the brain that contains the Circle of Willis
BASE
microscope used in studying ultrastructures
ELECTRON
soluble in organic solvents and serves as the
second source of energy
LIPIDS