biologydictionary.net/organ/#:~:text=Organ 1 Organ Definition. An organ is a,5 Related Biology Terms. ... 6 Quiz.
- Organ Definition. An organ is a self-contained group of tissues that performs a specific function in the body. ...
- Examples of Organs. All animals except for less specialized ones like those in the phylum Porifera (sea sponges) have specialized tissues grouped into organs.
- Cells, Tissues, Organs, Organ Systems. ...
- Types of Organs. ...
- Related Biology Terms. ...
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organ system A group of tissues or organs, often with a common embryological origin, that participate in the same major systemic activity, e.g., circulation or digestion. See ...SystemChief ComponentsMajor ActivitiesCirculatory or CardiovascularHeart, arteries, veins, blood capillaries, lymphatic vesselsMoves blood, oxygen, and nutrients to tissues. Transports hormones, leukocytes, and lymphocytes. Removes wastes and carbon dioxide from tissues.Digestive or AlimentaryOral cavity (incl., mouth, teeth, tongue, oropharynx), esophagus, stomach, duodenum, jejunum, colon, liver, pancreasTransforms consumed materials into absorbable molecules; absorbs water and small molecules.EndocrinePituitary (adenohypophysis and neurohypophysis), pineal gland, thyroid gland, parathyroid glands, suprarenal (adrenal) glands, pancreatic islets, neuroendocrine system, ovaries, testesRegulates metabolic processes, blood pressure, body temperature, reproductive cell cycles, and levels of blood molecules (e.g., glucose, sodium, water).HemolymphoidErythrocytes, leukocytes, lymphocytes, platelets, hemal generating tissues, lymphoid generating tissues (e.g., thymus, lymph nodes, spleen, lymphoid nodules)Carries oxygen, facilitates clotting, attaches to threatening antigenic substances, and generates immune reactions.
Mar 27, 2019 · Organ System Definition. An organ system is a group of organs that work together to perform a certain function in an organism’s body. Most animals and plants have organs, which are self-contained groups of tissues such as the heart that work together to perform one function.
An organ system is a group of organs that work together as a biological system to perform one or more functions. Each organ does a particular job in the body, and is made up of distinct tissues. Organs systems and their functions. There are eleven distinct organ systems in human beings,, which form the basis of anatomy. Other animals have ...Organ SystemDescriptionComponent Organsbreathing: exchange of oxygen and carbon dioxidenose, mouth, sinus, pharynx, larynx, trachea, bronchi, lungs and diaphragm.digestion: breakdown and absorption of nutrients, excretion of solid wastesteeth, tongue, salivary glands, esophagus, stomach, liver, gallbladder, pancreas, small intestine, large intestine, rectum and anuscirculate blood in order to transport nutrients, waste, hormones, O2, CO2, and aid in maintaining pH and temperatureblood, heart, arteries, veins, capillariesmaintain fluid and electrolyte balance, purify blood and excrete liquid waste (urine)kidneys, ureters, bladder and urethra
- Organ System Defined
- Integumentary, Muscular and Skeletal Systems
- Nervous, Circulatory and Lymphatic Systems
- Respiratory, Endocrine and Urinary/Excretory Systems
An organ systemis a group of anatomical structures that work together to perform a specific function or task. Although we learn about each organ system as a distinct entity, the functions of the body's organ systems overlap considerably, and your body could not function without the cooperation of all of its organ systems. In fact, the failure of even one organ system could lead to severe disability or even death. The human body is composed of 11 different organ systems. These include the following: 1. Integumentary 2. Muscular 3. Skeletal 4. Nervous 5. Circulatory 6. Lymphatic 7. Respiratory 8. Endocrine 9. Urinary/excretory 10. Reproductive 11. Digestive Some scientists add the immune system to this list to make a total of 12 organ systems, but most people consider the immune system to be a part of the lymphatic system. You may also find texts where the lymphatic and immune systems are both included within the circulatory system, which would give us a total of ten organ systems. St...
The integumentary systemincludes your skin, hair, subcutaneous fat and nails. The integumentary system offers protection from the environment, provides form and individual recognition characteristics and aids in temperature and water regulation. Your skin is the site where vitamin D is generated. The integument, or skin, also serves as an anchor for sensory receptors (which are part of the nervous system) that detect pain, cold, warmth and pressure. The muscular systemincludes the skeletal muscles but excludes smooth and cardiac muscles, which are included in other organ systems. The muscular system provides locomotion and support, allows us to manipulate our surroundings and - due to its high metabolic activity - produces heat. The skeletal systemis composed of bones, joints, cartilage, ligaments and tendons. Your skeleton provides structural support and protection for your internal organs. In cooperation with your muscular system, your skeletal system participates in movement and...
The nervous systemincludes the brain, spinal cord, autonomic and somatic nerves (i.e., involuntary and voluntary nerves) and all sensory organs, including those that serve vision, smell, sensation, balance, hearing and taste. Your nervous system coordinates your movements and controls your responses to both external and internal stimuli. It serves as the storehouse and processing center for memories, it regulates mood and it provides the mechanisms for social interaction and development. The circulatory systemincludes your heart, blood vessels and blood. Your circulatory system is responsible for delivering oxygen and nutrients to every cell, tissue and organ in your body. It also conveys immune cells, electrolytes, hormones and other vital substances throughout your body. The circulatory system directly communicates with the lymphatic system, leading many to count these two systems as one. The lymphatic systemis made up of the lymphatic vessels, which travel with your blood vessels...
The respiratory systemencompasses the organs of breathing, which include your nose, pharynx (mouth), larynx (throat), trachea (windpipe), bronchi and bronchioles (airways), lungs and diaphragm. Your sinuses, which are lined by the same type of cells that line your upper airways, are included in the respiratory system. Your respiratory system is the principal site of gas exchange in your body. It is here that oxygen is absorbed into to your bloodstream and carbon dioxide is removed. Air moving through your respiratory system also provides you with the ability to vocalize (i.e., speak and sing).
- Examples of Organ Systems
- Respiratory System
- Digestive System
The most obvious example of an organ system is the heart and the surrounding circulatory system. The circulatory system functions primarily to circulate blood to the various parts of the body. The primary components of the circulatory system are the heart, blood, and blood vessels such as arteries, veins, and capillaries. Humans have a closed circulatory system, meaning that their blood never leaves its network vessels, unlike the circulatory system of insects or mollusks. Through the pumping...
The respiratory system refers to the collection of organs that facilitate gas exchange in animals and plants. In humans and most other mammals, the main constituents of the respiratory system are the lungs, trachea, bronchi, diaphragm, and alveoli. When the diaphragm contracts, the chest cavity expands causing the pressure inside the empty lungs to change. Air from outside rushes down the trachea to equalizes the thoracic pressure and is pulled into the lungs. Once in the lungs, inhaled air enters the alveoli, tiny sacs made of thin membranes surrounded by capillaries of the circulatory system. Oxygen in the inhaled air diffuses across the alveolar membrane into the capillaries of the circulatory system and into the blood. Carbon dioxide from the blood also diffuses into the air in the lungs. Then, the diaphragm is relaxed and the deoxygenated air is exhaled out of the lungs as the thoracic cavity contracts. In plants, the main organs of the respiratory system are its leaves. On eve...
The digestive system serves mainly to break down consumed food into nutrients for the body to absorb. The main organs implicated in the digestive system are the esophagus, stomach, small intestine, and large intestine. The process of digestion actually starts as soon as you put food into your mouth. The combination of chewing and saliva breaks down the food enough to be swallowed down the esophagus. Rhythmic contractions of the esophageal lining (known as “peristalsis”) transport food into the stomach, where it is exposed to numerous digestive acids. Mucus produces by stomach cells protect the inside of the stomach from gastric acids strong enough to dissolve stainless steel blades. Once food has been processed in the stomach, it moves through the duodenum to the small intestines. While in the small intestine, the majority of nutrient absorption occurs. Tiny finger-like filaments on the inside of the intestinal wall called villi draw nutrients out of the digested food and the contin...
- Alexander Bolano
- Circulatory System
- Lymphatic System
- Respiratory System
- Integumentary System
- Endocrine System
- Gastrointestinal (digestive) System
- Urinary (Excretory) System
- Musculoskeletal System
- Nervous System
- Reproductive System
When we think of—and speak about—the circulatory system, we are usually talking about the cardiovascular system, which includes the heart and blood vessels (arteries and veins), as well as the blood itself. The circulatory system transports oxygen nutrients to all corners of the body and carries away byproducts of metabolism.1 In order for blood to make it everywhere it needs to go, the circulatory system maintains the blood flow within a certain pressure range. Blood pressurethat's too high puts undue stress on other organs and tissues. Low blood pressure means the blood—and its nutrients—won't make it to where it needs to go. High blood pressure kills you slowly while low blood pressure can kill you immediately.
The heart and the blood vessels are not the only organs circulating fluid around the body, and blood is not the only fluid circulated. The lymphatic system transports lymph (a fluid) using lymph vessels, lymph nodes, lymph ducts, and various glands. The lymphatic system is key for immunity, blood pressure regulation, digestion, and other functions.2 The lymphatic system is the drainage system of the body, carrying excess fluid, proteins, fats, bacteria, and other substances away from the cells and spaces between cells to be filtered, excreted, and recycled. The lymphatic system also helps to create and circulate vital cells used to fight disease (part of the immune system, which is covered below) including lymphocytes, monocytes, and antibodies.
The respiratory system contains the lungs, trachea (windpipe) and all of the airways of the respiratory tree. It is responsible for breathing, which is the controlled movement of air in and out of the body (ventilation) and the movement of oxygen and carbon dioxide into and out of the bloodstream (respiration).3 One of the least understood responsibilities of the respiratory system is to help regulate the body's pH balance. Carbon dioxide is made into carbonic acid, which the respiratory system can regulate through carbon dioxide levels. When a patient has a condition that affects the body's acidity, respiratory rate and depth can be a sign of the problem.
The integumentary system is skin, which includes all the sweat glands, hair follicles and plenty of nerves. The integumentary system is unique because it is the only single-organ system. Skin is both an organ and the entire organ system.
The endocrine system includes all the glands that secrete hormones into the bloodstream.4 Most people find the endocrine system and the nervous system as the two most complicated systems in the body. The endocrine system mostly regulates metabolism and utilizes the products of digestion.
The gastrointestinal system is affectionately known as the gut, which includes all the organs that carry food from where it enters to where it exits. The esophagus, stomach, and intestines are all part of the gastrointestinal system.5 There is a lot of interaction between the gastrointestinal system (often called the GI tract) and the endocrine system. The gastrointestinal system also plays host to a very important nerve called the vagus nerve. This is the main contributor to the parasympathetic nervous system and has a lot to do with slowing down metabolism, lowering heart rate and blood pressure, and stimulating the mechanics of digestion.
The urinary system is made up of the kidneys, ureters, bladder, and urethra.6 These organs work together to filter blood and remove toxins and waste from body tissues. The removal of excess fluid through the urinary system also helps to regulate blood pressure.
This is the skeleton and all the muscles, tendons and ligaments that are attached to it.7 The musculoskeletal system provides the framework and the engine for our movement, posture, and productivity. There are three types of muscles in the body: striated (skeletal or voluntary), smooth (visceral or involuntary) and cardiac (heart muscle). Only striated muscle is in the musculoskeletal system.
The nervous system includes the brain and spinal cord, plus all the nerves that are connected to both of these organs.8 The nervous system is incredibly detailed and includes the only tissue that isn't fed directly through contact with blood.
The reproductive system the only system that is split into two parts. Half of us have a penis and testicles while the other half has a vagina, uterus, and ovaries. This is the only organ system that is not complete in any one body and the only organ system that requires another person to complete its mission.
Mar 25, 2020 · Very simply put, the definition of an organ system is a group of organs that work with one another in order to achieve or perform a particular task or set of tasks. The human body has the following major organ systems: circulatory system, digestive system, endocrine system, excretory system, integumentary system, nervous system, respiratory ...
- Circulatory System. The main function of the circulatory system is to transport nutrients and gasses to cells and tissues throughout the body. This is accomplished by the circulation of blood.
- Digestive System. The digestive system breaks down food polymers into smaller molecules to provide energy for the body. Digestive juices and enzymes are secreted to break down the carbohydrates, fat, and protein in food.
- Endocrine System. The endocrine system regulates vital processes in the body including growth, homeostasis, metabolism, and sexual development. Endocrine organs secrete hormones to regulate body processes.
- Integumentary System. The integumentary system protects the internal structures of the body from damage, prevents dehydration, stores fat, and produces vitamins and hormones.