We are independent & ad-supported. We may earn a commission for purchases made through our links.

Advertiser Disclosure

Our website is an independent, advertising-supported platform. We provide our content free of charge to our readers, and to keep it that way, we rely on revenue generated through advertisements and affiliate partnerships. This means that when you click on certain links on our site and make a purchase, we may earn a commission. Learn more.

How We Make Money

We sustain our operations through affiliate commissions and advertising. If you click on an affiliate link and make a purchase, we may receive a commission from the merchant at no additional cost to you. We also display advertisements on our website, which help generate revenue to support our work and keep our content free for readers. Our editorial team operates independently from our advertising and affiliate partnerships to ensure that our content remains unbiased and focused on providing you with the best information and recommendations based on thorough research and honest evaluations. To remain transparent, we’ve provided a list of our current affiliate partners here.

What Are the Different Functions of the Human Body?

By Geisha A. Legazpi
Updated May 17, 2024
Our promise to you
WiseGeek is dedicated to creating trustworthy, high-quality content that always prioritizes transparency, integrity, and inclusivity above all else. Our ensure that our content creation and review process includes rigorous fact-checking, evidence-based, and continual updates to ensure accuracy and reliability.

Our Promise to you

Founded in 2002, our company has been a trusted resource for readers seeking informative and engaging content. Our dedication to quality remains unwavering—and will never change. We follow a strict editorial policy, ensuring that our content is authored by highly qualified professionals and edited by subject matter experts. This guarantees that everything we publish is objective, accurate, and trustworthy.

Over the years, we've refined our approach to cover a wide range of topics, providing readers with reliable and practical advice to enhance their knowledge and skills. That's why millions of readers turn to us each year. Join us in celebrating the joy of learning, guided by standards you can trust.

Editorial Standards

At WiseGeek, we are committed to creating content that you can trust. Our editorial process is designed to ensure that every piece of content we publish is accurate, reliable, and informative.

Our team of experienced writers and editors follows a strict set of guidelines to ensure the highest quality content. We conduct thorough research, fact-check all information, and rely on credible sources to back up our claims. Our content is reviewed by subject matter experts to ensure accuracy and clarity.

We believe in transparency and maintain editorial independence from our advertisers. Our team does not receive direct compensation from advertisers, allowing us to create unbiased content that prioritizes your interests.

A human being is composed of closely interlinked body systems that perform various functions of the human body. These functions of the human body include support, movement, gas exchange, regulation, protection, elimination, transport, energy acquisition, and continuity. Although the human body systems have separate roles, two of them have general control over other functions of the human body. These two systems, the nervous system and endocrine system, are responsible for homeostasis, or the maintenance of a steady state within the body.

In human anatomy the muscular and skeletal systems, called the musculoskeletal system, work together in providing support and in allowing the body to move. Through alternate contraction and relaxation of muscles, movement of body parts becomes possible. Even automatic movements of the body, such as heartbeat, occur due to the actions of muscles. Meanwhile, the adult human skeleton is a collection of 206 bones that are specialized to perform various functions. Bones maintain the body’s posture and protect the vital organs.

Oxygen, which is a gas necessary for human life, is naturally present in air that is taken in by the respiratory system. Inside the body, oxygen combines with the substances that provide energy, which come from food, in order to provide fuel for cells. Carbon dioxide is a waste material produced by the respiration process. The main organs of respiration are the lungs because they are responsible for the oxygen-carbon dioxide exchange, the most essential function of the respiratory system.

The nervous and endocrine systems generally integrate the functions of the human body. With the brain and spinal cord as its components, the nervous system receives and transmits signals through its network of nerve fibers. This allows the body to respond to its external environment. Meanwhile, the endocrine system controls body processes through its glands that produce hormones. Acting as messengers, hormones are released into and transported by blood to influence the activities of body organs.

An elaborate defense system, which includes the skin, mucous membranes, and lymph, protects the body against disease-causing agents. The skin and mucous membranes, or the first line of defense, prevent germs from getting inside the body. When they fail, the second line of defense, or the lymph, does its work by filtering and trapping germs. Meanwhile, most liquid wastes are removed by the urinary system. The kidneys filter wastes from the blood then these wastes mix with excess water so that urine is formed.

The heart propels blood that transports nutrients and oxygen, gets rid of wastes, and protects the body against infections. It is joined by the blood vessels and blood as components of the circulatory system. Meanwhile, a long tube called the digestive tract is responsible for the entire digestion process, allowing the body to acquire nutrients and energy from food, as well as to remove solid waste materials. Human beings have a comparatively brief life span; therefore, reproduction is necessary. With the action of the reproductive system, however, the continuity of the humankind is ensured.

WiseGeek is dedicated to providing accurate and trustworthy information. We carefully select reputable sources and employ a rigorous fact-checking process to maintain the highest standards. To learn more about our commitment to accuracy, read our editorial process.

Discussion Comments

WiseGeek, in your inbox

Our latest articles, guides, and more, delivered daily.

WiseGeek, in your inbox

Our latest articles, guides, and more, delivered daily.