Organ (anatomy)

organorgansviscerainternal organsvisceralinternal organvital organviscusvisceral organshollow organ
Organs are collections of tissues with similar functions.wikipedia
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Organ system

organ systemsbiological systemsystems
Plant and animal life relies on many organs that coexist in organ systems.
An organ system is a group of organs that work together as a biological system to perform one or more functions.

Tissue (biology)

tissuetissuesbiological tissue
Organs are collections of tissues with similar functions. Lymphatic system: structures involved in the transfer of lymph between tissues and the blood stream, the lymph and the nodes and vessels that transport it including the Immune system: defending against disease-causing agents with leukocytes, tonsils, adenoids, thymus and spleen.
In biology, tissue is a cellular organizational level between cells and a complete organ.

Heart

cardiachuman heartapex of the heart
The main tissue is that which is unique for the specific organ, such as the myocardium, the main tissue of the heart, while sporadic tissues include the nerves, blood vessels, and connective tissues. Cardiovascular system: pumping and channeling blood to and from the body and lungs with heart, blood and blood vessels.
The heart is a muscular organ in most animals, which pumps blood through the blood vessels of the circulatory system.

Stroma (tissue)

stromastromalstromal tissue
Organs are composed of main tissue, parenchyma, and "sporadic" tissues, stroma.
Stroma is the part of a tissue or organ with a structural or connective role.

Stomach

gastricfunduscardia
A hollow organ is an internal organ that forms a hollow tube, or pouch such as the stomach, intestine, or bladder. Digestive system: digestion and processing food with salivary glands, esophagus, stomach, liver, gallbladder, pancreas, intestines, colon, rectum and anus.
The stomach is a muscular, hollow organ in the gastrointestinal tract of humans and many other animals, including several invertebrates.

Gastrointestinal tract

intestinegastrointestinaldigestive tract
A hollow organ is an internal organ that forms a hollow tube, or pouch such as the stomach, intestine, or bladder. Digestive system: digestion and processing food with salivary glands, esophagus, stomach, liver, gallbladder, pancreas, intestines, colon, rectum and anus.
The gastrointestinal tract (digestive tract, digestional tract, GI tract, GIT, gut, or alimentary canal) is an organ system within humans and other animals which takes in food, digests it to extract and absorb energy and nutrients, and expels the remaining waste as feces.

Organelle

organellescell organellescell organelle
In single-celled organisms such as bacteria, the functional analogue of an organ is known as an organelle.
The name organelle comes from the idea that these structures are parts of cells, as organs are to the body, hence organelle, the suffix -elle being a diminutive.

Anatomy

anatomistanatomicalanatomically
In the study of anatomy, the term viscus is used to refer to an internal organ, and viscera is the plural form.
The history of anatomy is characterized by a progressive understanding of the functions of the organs and structures of the human body.

Organism

organismsflora and faunaliving organisms
Organs exist in all organisms.
Humans are multicellular animals composed of many trillions of cells which differentiate during development into specialized tissues and organs.

Germ layer

germ layersmesodermectoderm
The main tissues that make up an organ tend to have common embryologic origins, such as arising from the same germ layer.
Germ layers eventually give rise to all of an animal’s tissues and organs through the process of organogenesis.

Biological system

biological systemsbody systemsorgan system
Two or more organs working together in the execution of a specific body function form an organ system, also called a biological system or body system.
On the organ and tissue scale in mammals and other animals, examples include the circulatory system, the respiratory system, and the nervous system.

Human musculoskeletal system

musculoskeletalmusculoskeletal systemlocomotor
The same is true for the musculoskeletal system because of the relationship between the muscular and skeletal systems.
The human musculoskeletal system (also known as the locomotor system, and previously the activity system ) is an organ system that gives humans the ability to move using their muscular and skeletal systems.

Muscular system

muscularmuscle systemMuscles
The same is true for the musculoskeletal system because of the relationship between the muscular and skeletal systems.
The muscular system is an organ system consisting of skeletal, smooth and cardiac muscles.

Lung

lungspulmonaryright lung
Cardiovascular system: pumping and channeling blood to and from the body and lungs with heart, blood and blood vessels.
The lungs are the primary organs of the respiratory system in humans and many other animals including a few fish and some snails.

Liver

hepaticliver protein synthesislivers
Digestive system: digestion and processing food with salivary glands, esophagus, stomach, liver, gallbladder, pancreas, intestines, colon, rectum and anus.
The liver, an organ only found in vertebrates, detoxifies various metabolites, synthesizes proteins, and produces biochemicals necessary for digestion.

Esophagus

oesophagusesophageallower esophageal sphincter
Digestive system: digestion and processing food with salivary glands, esophagus, stomach, liver, gallbladder, pancreas, intestines, colon, rectum and anus.
The esophagus (American English) or oesophagus (British English), commonly known as the food pipe or gullet (gut), is an organ in vertebrates through which food passes, aided by peristaltic contractions, from the pharynx to the stomach.

Parenchyma

parenchymalparenchymatouslung parenchyma
Organs are composed of main tissue, parenchyma, and "sporadic" tissues, stroma.
The parenchyma is the functional parts of an organ in the body.

Pancreas

pancreaticexocrine pancreashead of the pancreas
Digestive system: digestion and processing food with salivary glands, esophagus, stomach, liver, gallbladder, pancreas, intestines, colon, rectum and anus.
The pancreas is an organ of the digestive system and endocrine system of vertebrates.

Gallbladder

gall bladdergall-bladdercholecysto
Digestive system: digestion and processing food with salivary glands, esophagus, stomach, liver, gallbladder, pancreas, intestines, colon, rectum and anus.
In vertebrates, the gallbladder is a small hollow organ where bile is stored and concentrated before it is released into the small intestine.

Human body

bodyhuman anatomyhuman physiology
Cardiovascular system: pumping and channeling blood to and from the body and lungs with heart, blood and blood vessels. These specific systems are also widely studied in human anatomy.
At maturity, there are roughly 30 –37 trillion cells in the body, an estimate arrived at by totaling the cell numbers of all the organs of the body and cell types.

Kidney

kidneysrenalrenal circulation
Excretory system: kidneys, ureters, bladder and urethra involved in fluid balance, electrolyte balance and excretion of urine.
The kidneys are two bean-shaped organs found in vertebrates.

Hormone

hormoneshormonalprohormone
Endocrine system: communication within the body using hormones made by endocrine glands such as the hypothalamus, pituitary gland, pineal body or pineal gland, thyroid, parathyroids and adrenals, i.e., adrenal glands.
Hormones are used to communicate between organs and tissues for physiological regulation and behavioral activities, such as digestion, metabolism, respiration, tissue function, sensory perception, sleep, excretion, lactation, stress, growth and development, movement, reproduction, and mood.

Endocrine gland

endocrine glandsductless glandendocrine
Endocrine system: communication within the body using hormones made by endocrine glands such as the hypothalamus, pituitary gland, pineal body or pineal gland, thyroid, parathyroids and adrenals, i.e., adrenal glands.
The hypothalamus and pituitary gland are neuroendocrine organs.

Lymph node

lymph glandslymph glandfollicle
Lymphatic system: structures involved in the transfer of lymph between tissues and the blood stream, the lymph and the nodes and vessels that transport it including the Immune system: defending against disease-causing agents with leukocytes, tonsils, adenoids, thymus and spleen.
A lymph node or lymph gland is an ovoid or kidney-shaped organ of the lymphatic system, and of the adaptive immune system, that is widely present throughout the body.

Endocrine system

endocrineendocrine organendocrinological
Endocrine system: communication within the body using hormones made by endocrine glands such as the hypothalamus, pituitary gland, pineal body or pineal gland, thyroid, parathyroids and adrenals, i.e., adrenal glands. For instance, the nervous and endocrine system both operate via a shared organ, the hypothalamus.
The hypothalamus and pituitary gland are neuroendocrine organs.