What are humans made of?

Everything in the body id made up of atoms, the tiniest building blocks of matter. Atoms combine to form molecules. Millions of molecules form every cell in the body. There are more than 200 types of cell, with similar cells working in teams called tissues. The body’s many organs and systems are made up of different tissues.

Atoms and molecules

The smallest parts in the body are atoms. These tiny building blocks form the elements in the body, such as carbon. Atoms can also join together in groups called molecules – for example, water is a molecule, made from a combination of hydrogen and oxygen atoms.

Cell

Molecules build up to create body cells. There are about 37 trillion cells in the average human, with different types of cells carrying out a variety of body functions, from transporting oxygen to sensing light and colour in the eye.

Tissue

Cells performing the same function are grouped together to form body tissues, such as skin, fat, or heart muscle. Blood is also a tissue, in liquid form.

Organ

Different kinds of tissue combine to make larger structures called organs. Each organ works like a machine, performing its own role. An example of an organ is the stomach, which plays a part in the process of digesting food.

Body system

Organs are at the centre of 12 internal body systems. Each system has a specific job to keep the body in working order. The stomach is one of the main organs of the digestive system.

Complete human

When this common combination of integrated systems, organs, and tissues works together, the human body is complete. Each individual component plays its part in maintaining a fully functioning body.

 

Picture Credit : Google