The respiratory system , which includes air passages, pulmonary vessels, the lungs, and breathing muscles, provides oxygenated blood to the body tissues and removes waste gases. The digestive system enables your body to convert food into usable nutrients through a chemical breakdown process. This occurs through a system of tube-like of organs, including the esophagus, stomach, liver, pancreas, and intestines. The skeletal system gives the body its basic framework, providing structure, protection, and movement.
The bones in the body also produce blood cells, store important minerals, and release hormones necessary to life. The muscular system is comprised of the sum total of muscles throughout the body that move the skeleton, maintain posture through steady contraction, and generate heat through cell metabolism. Humans have three types of muscle. The nervous system allows us to perceive, comprehend, and respond to the world around us.
The female reproductive system encompasses all necessary female organs needed to conceive and bear a child. The male reproductive system consists of a series of organs used during sexual intercourse and procreation. The primary organs are the gonads, or sex glands, which produce sperm. Respiratory System. Reviewed January 24, Your Privacy Rights. To change or withdraw your consent choices for VerywellHealth. At any time, you can update your settings through the "EU Privacy" link at the bottom of any page.
These choices will be signaled globally to our partners and will not affect browsing data. We and our partners process data to: Actively scan device characteristics for identification. I Accept Show Purposes. Table of Contents View All. Table of Contents. High blood pressure kills you slowly while low blood pressure can kill you immediately. How Your Circulatory System Works. Benefits of Lymphatic Drainage. What Respiratory Failure Means. The Skin and How It Works.
How Your Digestive System Works. Anatomy and Diseases of the Musculoskeletal System. The Female Reproductive System. Frequently Asked Questions What does an organ system do?
What organs are in the nervous system? What is the main organ of the circulatory system? Which organs are in the respiratory system? How Your Immune System Works. Was this page helpful? Thanks for your feedback! Sign Up. What are your concerns? Verywell Health uses only high-quality sources, including peer-reviewed studies, to support the facts within our articles.
Read our editorial process to learn more about how we fact-check and keep our content accurate, reliable, and trustworthy. When one is not functioning properly, the others will attempt to correct the problem. All the systems will work together to try to create what is known as homeostasis or a state of balance within the body.
The 11 organ systems include the integumentary system, skeletal system, muscular system, lymphatic system, respiratory system, digestive system, nervous system, endocrine system, cardiovascular system, urinary system, and reproductive systems. The VA defines 14 disability systems , which are similar to the body systems.
However, the disability systems are separated differently for rating purposes. These systems are listed with the medical listing and are identified independently when necessary. For Individual Unemployability ratings; if you are rated with more than one disability within one body system, your rating will increase towards unemployability. For this reason, we have outlined the VA defined body systems and have included a link to our VA Unemployability Calculator so you can see if your ratings make you eligible for Individual Unemployment.
Below is a description of the basic functions of each system as well as some of the diseases and disorders associated with each system. These lists are not complete and do not take the place of medical advice. It acts as a barrier to physical, chemical, and biological agents.
The skin prevents water loss and regulates body temperature. It transmits the senses of touch, pain, and pleasure and maintains body temperature by secreting sweat. The hair lubricates the scalp, which secretes pheromones and cools or warms our heads.
The nails protect our fingers, which are a major tool used for protecting ourselves and providing ourselves with food, shelter, and sensations.
The skin leaves us most vulnerable when it is compromised by open wounds, allowing infectious agents into the body. The ribs protect the abdominal organs, which are both vulnerable to injury and dangerous to our well being when injured. The skull protects our brain which controls all functions of our bodies and minds. The skeleton provides the framework and shape to our bodies.
It also connects to our major muscles to allow movement. Bones store minerals such as calcium and create blood cells in the soft bone tissue called marrow. Bones can break easily without enough calcium and are subject to such diseases as arthritis; cancers; scoliosis; osteoporosis, gout; bursitis; fractures and breaks; and amputations. This system transports clean fluids in our body back to the blood and drains excess fluids and debris from the tissues and cells of the body. It also houses the white blood cells lymphocytes involved in protecting our bodies from infection.
This system maintains our breathing. It supplies the body with oxygen for cellular respiration by collecting oxygen in the lungs and disposes of carbon dioxide by breathing out the waste product. It also provides our functions of speech and smell. Kidneys are blood purifiers filtering liquid from the bloodstream, removing undesirable substances such as toxins and returning those still required to the blood.
Immune system The immune system is a protection mechanism composed of specialised cells, cell products, tissues, organs and processes within an organism that protect against pathogens.
Integumentary system Commonly known as the skin, this system wraps the body in a protective covering with a number of functions such as UV protection and temperature regulation, taking it well beyond being just a mere covering.
Musculoskeletal system The skeleton provides a framework on which the human body is arranged. It is articulated to allow free movement in conjunction with the skeletal muscles. They control movement, posture and assist the body with heat generation.
Our bodies are held together by connective tissue. Respiratory system Our bodies are made up of countless cells all requiring oxygen to carry out the important process of respiration.
In this process cells use oxygen gas and produce carbon dioxide gas — a waste product that must be removed from the body. The process of breathing allows these gases to be exchanged between the blood and lungs.
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