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At this level, atoms combine to form molecules such as water or even proteins.
Atoms
Form
Molecules
These molecules will come together in a specific way to make organelles, the basic component of cells.
These cells each have a unique shape depending on what function they perform in the body.
Molecules
Form
Cells
Some of the simplest creatures are made of one cell but more complex beings, such as humans, contain more cells then is possible to count.
Cells
Tissues are groups of cells that have a common function.
Form
Tissue
There are four types of tissue: epitheliem, muscle, connective, and nervous. Each type has a specific role in the body.
An organ is a structure in the body made up of at least two types of tissue.
Tissue
Form
Organs
Organs perform complex functions, such as the heart pumping blood to the rest of the body.
Organs
Form
An organ system is a group of organs working together to accomplish a common purpose.
Organ Systems
Organs Systems
For example, blood vessels and the heart work togehter to make sure that blood is circulated continuously to carry nutrients and oxygen to body cells.
Form
Organisms
The organismal level is the sum of all the structural level working together to promote life. It is the highest level of organization.