three, actually. Food, water, air.
Brain, heart, spinal cord, etc.
The function of the circulation unit in the human body is to transport oxygen, nutrients, and waste products throughout the body via the blood vessels, ensuring that all cells receive what they need and waste is removed efficiently.
When you are no longer able to survive or function efficiently without the thing in question.
Oxygen and nutrients
Living things need to eat in order to survive; they need to consume nutritions and calories to give them energy and the materials the body needs to function.
oxygen.
We need energy in order to function (and live).
Some things that need electricity to function properly include smartphones, computers, refrigerators, air conditioners, televisions, and lights.
All cells in the body need nutrients, such as proteins, carbohydrates, fats, vitamins, and minerals, to function properly and carry out their specific roles. Additionally, cells require oxygen for energy production and waste removal. Maintaining proper hydration is also crucial for cells to operate efficiently.
People and machines always need clear communication and defined objectives to effectively get things done. Additionally, resources such as information, tools, and energy are essential for both to function optimally. Collaboration and adaptability also play crucial roles in ensuring tasks are completed efficiently.
food, water, and oxygen
It helps the brain function properly!