Lipid - A broad group of molecules including fats and waxes that are insoluble in water and are an important part of living cells.⏎
Immune System - The system of biological structures and processes that protects the body from foreign substances, including pathogens.⏎
Habitat - The specific geographical area or physical environment that is inhabited by an organism or a population of organisms.⏎
Infectious Disease - A type of illness caused by a pathogenic agent, including viruses, bacteria, fungi, protozoa, parasites, or abnormal proteins known as prions.⏎