What is an Organ?
An organ is a group of tissues in a living body that have a specific shape and function.
What is Organ Systems
Organs are grouped into organ systems. An organ system that performs a specific task. In most animals, there are ten major organ systems:
Nervous System – The nervous system is responsible for transmitting information from the brain to different parts of the body. It includes the brain, spinal cord, and nerves.
Respiratory System – The respiratory system is responsible for breathing. It transfers oxygen into the blood and removes carbon dioxide. It includes the lungs, larynx, and airways.
Cardiovascular or Circulatory System – The cardiovascular system carries blood throughout the body to help deliver nutrients to various organs. It includes the heart, blood and blood vessels.
Digestive System – The digestive system converts food into substances that can be used by different parts of the body for energy and nutrients. It includes organs such as the stomach, gallbladder, intestines, liver, and pancreas.
Endocrine System – The endocrine system uses hormones to regulate many functions in the body, such as growth, mood, metabolism, and reproduction. The major organs of the endocrine system include glands such as the pituitary, thyroid, and adrenal glands.
Excretory System – The excretory system helps your body get rid of food and toxins that your body doesn’t need. It includes organs such as the kidneys and bladder.
Integumentary System – The Integumentary system protects the body from the outside world. It includes skin, hair and nails.
Muscular System – The muscular system is made up of all the muscles in our body. It is controlled by the nervous system.
Reproductive System – The reproductive system includes all the organs necessary for the reproduction process. Unlike the rest of the organ systems, the male reproductive system is different from that of the female.
Skeletal System – The skeletal system provides support and protection to the rest of the organ system. It is made up of bones, ligaments, tendons and cartilage.
Do Plants have Organs?
Yes, all complex living things have some kind of organ. The three main organ systems of plants include roots, stems, and leaves. You can visit this page to learn more about the main structures of plants.
Major Organs in the Human Body
As you can see from the long list of organ systems, the human body has a huge number of organs that, in one way or another, all work together to sustain our life. . Below is a list and brief description of some of the major agencies.
Brain – Perhaps the most important organ in our body is the brain. This is where we think, feel emotions, make decisions, and control the rest of our bodies. The brain is protected by a thick, loose skull.
Lungs – The lungs are the main organs that carry much-needed oxygen into our blood.
Liver – The liver performs all kind of important functions in our bodies, from helping us break down food during digestion to removing toxins from the body.
Stomach – The stomach holds our food when we first eat it and secretes enzymes that help break down the food before it reaches the small intestine.
Kidneys – The kidneys help keep our bodies clean of toxins and other waste products. Without the kidneys, our blood would quickly become contaminated.
Heart – The heart is considered by many to be the center of life. Having a healthy heart also helps keep the rest of the organs and body healthy.
Skin – The skin is the main organ that covers our entire body. It also provides feedback to the brain through touch.
Interesting Facts about Organs
Some organs are called hollow organs because they have a hollow tube or sac. Examples of hollow organs include the stomach, intestines, and heart.
The eye is an organ that is often considered part of the nervous system.
Other organ systems in the human body include the immune system and the lymphatic system.
The small intestine is actually much longer than the large intestine.
Some scientists say the liver performs up to 500 different functions.