Why Are Human Cells Important?

Human cells are important because they keep your entire body alive and working. Every single thing your body does—moving, breathing, growing, healing, and thinking—happens because of the work that cells do. Without cells, your body would not exist.

Human cells have main parts like the cell membrane, cytoplasm, nucleus, mitochondria, ribosomes, endoplasmic reticulum, Golgi apparatus, and lysosomes.

Each part has a special job, like protecting the cell, making energy, building proteins, or controlling cell activities.

How do Human Cells Help the Body?

• They build the body

  All your body parts—like your heart, skin, bones, and muscles—are made of cells. Cells group together to form tissues and organs.

• They give energy

  Cells take in food and oxygen to make energy. You need energy for everything—running, blinking, even sleeping.

• They repair damage

  When you get a cut or bruise, cells multiply to heal the injury. They fix broken tissues and grow new ones.

• They fight diseas

  White blood cells in your body attack and destroy germs like viruses and bacteria. They protect you from getting sick.

• They send messages

  Nerve cells send signals from your brain to your body. This helps you move, feel, and react quickly.

• They help you grow

  As you grow from a baby to an adult, your cells divide and increase in number. This is how your body becomes bigger and stronger.

• They make new cells

  Old or damaged cells die, and new ones are made all the time. This keeps your body healthy and working properly.

Types of Human Cells

There are over 200 types of human cells. Each type has a different job:

• Skin cells – Form a protective layer on the outside of the body.

• Muscle cells – Help you move.

• Blood cells –

  
  

  • Red blood cells carry oxygen.

  • White blood cells fight infections.

  
  

• Nerve cells (neurons) – Send signals to and from the brain.

• Bone cells – Build and repair bones.

• Stem cells – Special cells that can become other types of cells when needed.

Note/summary— The most interesting fact about cells are, that there are 37 trillion cells in our body and every minute, millions of cells die and other cells replace them. Even though we cannot see them these tiny cells are things which keeps us alive.