WHAT IS HUMAN MADE OF?

🔬 At the smallest level, humans are made of:

• Atoms — mainly:
• Oxygen (O)
• Carbon (C)
• Hydrogen (H)
• Nitrogen (N)
• Plus smaller amounts of calcium, phosphorus, potassium, sulfur, sodium, chlorine, magnesium, iron, etc.

Fun fact: You’re about 60% water, and water is just hydrogen and oxygen!

🧬 Then, atoms combine into molecules:

• Water (H₂O)
• Proteins (made of amino acids)
• Carbohydrates (sugars and starches)
• Lipids (fats)
• DNA and RNA (your genetic material)

🧫 Molecules build cells, the basic unit of life:

• You have around 30–40 trillion cells — each one like a tiny city with a power plant (mitochondria), control center (nucleus), and more.
• Different types of cells do different jobs: muscle cells move you, nerve cells send signals, blood cells carry oxygen.

🧍‍♂️ Then cells make up:

• Tissues → like muscle, nerve, fat, bone
• Organs → heart, brain, liver, lungs
• Systems → circulatory, nervous, digestive, immune, etc.

🧠🫀 In simple terms:

A human is made of water, organic molecules, cells, and a whole lot of chemistry, all working together in a complex, beautiful system.