Porto.80307.390x390cm.xml

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The human body is made up of approximately 60 trillion cells, each one performing a vital role in maintaining life. These cells are organized into systems that work together to keep us alive and functioning properly. The skeletal system provides support for our bodies, while the muscular system allows us to move and perform physical activities. The nervous system, which includes the brain and spinal cord, enables us to think, learn, and respond to our environment. Meanwhile, the circulatory system transports oxygen and nutrients to our cells and carries away waste products. The digestive system breaks down food into energy that we can use for various bodily functions. The respiratory system brings oxygen into our bodies through inhalation, while exhalation removes carbon dioxide from our systems. Finally, the immune system protects us against infections by fighting off invading pathogens.