1. Biomolecules (Organic Molecules):
* Carbohydrates:
* Sugars (monosaccharides): Glucose, fructose, galactose - provide energy
* Disaccharides: Sucrose, lactose, maltose - provide energy
* Polysaccharides: Starch (energy storage), glycogen (energy storage), cellulose (structural component of plant cell walls)
* Lipids (Fats and Oils):
* Triglycerides: Fatty acids attached to glycerol - energy storage, insulation, cushioning
* Phospholipids: Form cell membranes
* Steroids: Cholesterol, hormones - structural components, signaling
* Proteins:
* Enzymes: Catalyze biochemical reactions
* Hormones: Act as chemical messengers
* Antibodies: Help fight infections
* Structural proteins: Collagen, keratin - provide support and structure
* Transport proteins: Hemoglobin (carries oxygen in blood)
* Nucleic Acids:
* Deoxyribonucleic acid (DNA): Stores genetic information
* Ribonucleic acid (RNA): Involved in protein synthesis
2. Inorganic Molecules:
* Water (H2O): The most abundant molecule in the body - essential for many biological processes
* Minerals: Calcium, phosphorus, potassium, sodium, magnesium, iron, etc. - involved in bone formation, nerve function, muscle contraction, and many other processes
* Gases: Oxygen (O2) - essential for respiration, Carbon dioxide (CO2) - waste product of respiration, Nitrogen (N2) - component of proteins and nucleic acids
3. Other Important Molecules:
* Vitamins: Essential organic compounds required in small amounts - important for various metabolic functions
* Electrolytes: Dissolved ions (e.g., sodium, potassium, chloride) - play crucial roles in fluid balance and nerve function
Important Notes:
* The human body is a dynamic system where these molecules interact and constantly change.
* The relative abundance of each type of molecule varies depending on tissue and organ.
* There are many other important molecules, but this list provides a general overview of the major classes.
It's worth noting that there are still many molecules that we are yet to fully understand and their roles in the human body continue to be investigated by scientists.
