The following is a list of the "A" codes for MeSH

Mesh

Mesh consists of semi-permeable barrier made of connected strands of metal, fiber, or other flexible/ductile material. Mesh is similar to web or net in that it has many attached or woven strands.-Types of mesh:...

. It is a product of the United States National Library of Medicine

United States National Library of Medicine

The United States National Library of Medicine , operated by the United States federal government, is the world's largest medical library. Located in Bethesda, Maryland, the NLM is a division of the National Institutes of Health...

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Source for content is here. (File "2006 MeSH Trees".)

--- connective tissue

Connective tissue

"Connective tissue" is a fibrous tissue. It is one of the four traditional classes of tissues . Connective Tissue is found throughout the body.In fact the whole framework of the skeleton and the different specialized connective tissues from the crown of the head to the toes determine the form of...

--- adipose tissue

Adipose tissue

In histology, adipose tissue or body fat or fat depot or just fat is loose connective tissue composed of adipocytes. It is technically composed of roughly only 80% fat; fat in its solitary state exists in the liver and muscles. Adipose tissue is derived from lipoblasts...

 --- abdominal fat --- intra-abdominal fat --- subcutaneous fat, abdominal --- brown fat --- subcutaneous fat --- subcutaneous fat, abdominal --- bone and bones --- bone matrix --- bony callus --- haversian system --- periosteum

Periosteum

Periosteum is a membrane that lines the outer surface of all bones, except at the joints of long bones. Endosteum lines the inner surface of all bones....

 --- cartilage

Cartilage

Cartilage is a flexible connective tissue found in many areas in the bodies of humans and other animals, including the joints between bones, the rib cage, the ear, the nose, the elbow, the knee, the ankle, the bronchial tubes and the intervertebral discs...

 --- elastic cartilage

Elastic cartilage

Elastic cartilage or yellow cartilage is a type of cartilage present in the outer ear, larynx, and epiglottis. It contains elastic fiber networks and collagen fibers. The principal protein is elastin....

 --- fibrocartilage

Fibrocartilage

White fibrocartilage consists of a mixture of white fibrous tissue and cartilaginous tissue in various proportions. It owes its flexibility and toughness to the former of these constituents, and its elasticity to the latter...

 --- triangular fibrocartilage

Triangular fibrocartilage

The Triangular fibrocartilage complex is formed by the triangular fibrocartilage discus , the radioulnar ligaments and the ulnocarpal ligaments .- Anatomy :Triangular fibrocartilage discus...

 --- hyaline cartilage

Hyaline cartilage

Hyaline cartilage consists of a slimy mass, pearly bluish in colour with firm consistency and considerable collagen. It contains no nerves or blood vessels, and its structure is relatively simple....

 --- elastic tissue --- granulation tissue

Granulation tissue

Granulation tissue is the perfused, fibrous connective tissue that replaces a fibrin clot in healing wounds. Granulation tissue typically grows from the base of a wound and is able to fill wounds of almost any size it heals...

 --- cicatrix --- subcutaneous tissue

Subcutaneous tissue

The hypodermis, also called the hypoderm, subcutaneous tissue, or superficial fascia is the lowermost layer of the integumentary system in vertebrates. Types of cells that are found in the hypodermis are fibroblasts, adipose cells, and macrophages...

--- epithelium

Epithelium

Epithelium is one of the four basic types of animal tissue, along with connective tissue, muscle tissue and nervous tissue. Epithelial tissues line the cavities and surfaces of structures throughout the body, and also form many glands. Functions of epithelial cells include secretion, selective...

--- basement membrane

Basement membrane

The basement membrane is a thin sheet of fibers that underlies the epithelium, which lines the cavities and surfaces of organs including skin, or the endothelium, which lines the interior surface of blood vessels.- Composition :...

 --- bruch membrane --- endothelium

Endothelium

The endothelium is the thin layer of cells that lines the interior surface of blood vessels, forming an interface between circulating blood in the lumen and the rest of the vessel wall. These cells are called endothelial cells. Endothelial cells line the entire circulatory system, from the heart...

 --- endothelium, corneal --- endothelium, lymphatic --- endothelium, vascular --- pericytes --- tunica intima

Tunica intima

The tunica intima is the innermost layer of an artery or vein. It is made up of one layer of endothelial cells and is supported by an internal elastic lamina...

 --- epidermis --- hair follicle

Hair follicle

A hair follicle is a skin organ that produces hair. Hair production occurs in phases, including a growth phase , and cessation phase , and a rest phase . Stem cells are principally responsible for the production of hair....

 --- epithelium, corneal --- pigment epithelium of eye --- seminiferous epithelium --- urothelium

Urothelium

The urothelium is a form of transitional epithelial tissue layer that lines much of the urinary tract, including the renal pelvis, the ureters, the bladder, and parts of the urethra.-Structure and function:...

--- exocrine glands

--- bartholin's glands --- bulbourethral glands --- lacrimal apparatus

Lacrimal apparatus

The lacrimal apparatus is the physiologic system containing the orbital structures for tear production and drainage.It consists of:* the lacrimal gland, which secretes the tears, and its excretory ducts, which convey the fluid to the surface of the eye;...

 --- mammary glands, animal --- mammary glands, human --- pancreas, exocrine --- prostate

Prostate

The prostate is a compound tubuloalveolar exocrine gland of the male reproductive system in most mammals....

 --- salivary glands --- parotid gland

Parotid gland

The paired parotid glands are the largest of the salivary glands. They are each found wrapped around the mandibular ramus, and secrete saliva through Stensen's ducts into the oral cavity, to facilitate mastication and swallowing and to begin the digestion of starches.-Location:The parotid glands...

 --- salivary ducts --- salivary glands, minor --- sublingual gland

Sublingual gland

The sublingual glands are salivary glands in the mouth.They lie anterior to the submandibular gland under the tongue, beneath the mucous membrane of the floor of the mouth.They are drained by 8-20 excretory ducts called the ducts of Rivinus....

 --- submandibular gland

Submandibular gland

The paired submandibular glands are salivary glands located beneath the floor of the mouth. In humans, they account for 70% of the salivary volume and weigh about 15 grams. Unstimulated in humans, the percentage contribution to whole saliva; ~25% Parotid, Submandibular and Sublingual ~ 67% and...

 --- sebaceous glands --- meibomian glands --- sweat glands --- apocrine glands --- eccrine glands

--- lymphoid tissue

--- adenoids --- bursa of fabricius

Bursa of Fabricius

In birds, the bursa of Fabricius is the site of hematopoiesis, a specialized organ that, as first demonstrated by Bruce Glick and later by Max Cooper and Robert Good, is necessary for B cell development in birds...

 --- germinal center

Germinal center

Germinal centers are sites within lymph nodes where mature B lymphocytes rapidly proliferate, differentiate, mutate their antibodies , and class switch their antibodies during a normal immune response to an infection...

 --- dendritic cells, follicular --- lymph nodes --- germinal center

Germinal center

Germinal centers are sites within lymph nodes where mature B lymphocytes rapidly proliferate, differentiate, mutate their antibodies , and class switch their antibodies during a normal immune response to an infection...

 --- dendritic cells, follicular --- peyer's patches --- spleen

Spleen

The spleen is an organ found in virtually all vertebrate animals with important roles in regard to red blood cells and the immune system. In humans, it is located in the left upper quadrant of the abdomen. It removes old red blood cells and holds a reserve of blood in case of hemorrhagic shock...

 --- thymus gland --- tonsil

Tonsil

Palatine tonsils, occasionally called the faucial tonsils, are the tonsils that can be seen on the left and right sides at the back of the throat....

--- membranes

Biological membrane

A biological membrane or biomembrane is an enclosing or separatingmembrane that acts as a selective barrier, within or around a cell. It consists of a lipid bilayer with embedded proteins that may constitute close to 50% of membrane content...

--- basement membrane

Basement membrane

The basement membrane is a thin sheet of fibers that underlies the epithelium, which lines the cavities and surfaces of organs including skin, or the endothelium, which lines the interior surface of blood vessels.- Composition :...

 --- basilar membrane

Basilar membrane

The basilar membrane within the cochlea of the inner ear is a stiff structural element that separates two liquid-filled tubes that run along the coil of the cochlea, the scala media and the scala tympani .-Function:...

 --- bruch membrane --- descemet membrane --- glomerular basement membrane

Glomerular basement membrane

The glomerular basement membrane is the basal laminal portion of the glomerulus. The Glomerular capillary endothelial cells, the GBM and the filtration slits between the podocytes perform the filtration function of the glomerulus, separating the blood in the capillaries from the filtrate that...

 --- extraembryonic membranes --- allantois

Allantois

Allantois is a part of a developing animal conceptus . It helps the embryo exchange gases and handle liquid waste....

 --- amnion

Amnion

The amnion is a membrane building the amniotic sac that surrounds and protects an embryo. It is developed in reptiles, birds, and mammals, which are hence called “Amniota”; but not in amphibians and fish , which are consequently termed “Anamniota”. The primary role of this is the protection of the...

 --- chorioallantoic membrane

Chorioallantoic membrane

The chorioallantoic membrane — also called the chorioallantois or abbreviated to CAM — is a vascular membrane found in eggs of some amniotes, such as birds and reptiles. It is formed by the fusion of the mesodermal layers of two developmental structures: the allantois and the chorion...

 --- chorion

Chorion

The chorion is one of the membranes that exist during pregnancy between the developing fetus and mother. It is formed by extraembryonic mesoderm and the two layers of trophoblast and surrounds the embryo and other membranes...

 --- chorionic villi

Chorionic villi

Chorionic villi are villi that sprout from the chorion in order to give a maximum area of contact with the maternal blood.Embryonic blood is carried to the villi by the branches of the umbilical arteries, and after circulating through the capillaries of the villi, is returned to the embryo by the...

 --- yolk sac

Yolk sac

The yolk sac is a membranous sac attached to an embryo, providing early nourishment in the form of yolk in bony fishes, sharks, reptiles, birds, and primitive mammals...

 --- mucous membrane

Mucous membrane

The mucous membranes are linings of mostly endodermal origin, covered in epithelium, which are involved in absorption and secretion. They line cavities that are exposed to the external environment and internal organs...

 --- gastric mucosa

Gastric mucosa

The gastric mucosa is the mucous membrane layer of the stomach which contains the glands and the gastric pits. In men it is about 1 mm thick and its surface is smooth, soft, and velvety...

 --- chief cells, gastric --- enterochromaffin cells --- gastrin-secreting cells --- parietal cells, gastric --- somatostatin-secreting cells --- intestinal mucosa --- enterocytes --- goblet cells --- paneth cells

Paneth cells

Paneth cells, along with goblet cells, enterocytes, and enteroendocrine cells, represent the principal cell types of the epithelium of the small intestine...

 --- mouth mucosa --- respiratory mucosa --- laryngeal mucosa --- goblet cells --- nasal mucosa --- goblet cells --- olfactory mucosa

Olfactory mucosa

The olfactory mucosa is located in the upper region of the nasal cavity and is made up of the olfactory epithelium and the underlying lamina propria, connective tissue containing fibroblasts, blood vessels, Bowman's glands and bundles of fine axons from the olfactory neurons.The mucus protects the...

 --- olfactory receptor neurons --- serous membrane

Serous membrane

In anatomy, serous membrane is a smooth membrane consisting of a thin layer of cells which secrete serous fluid. Serous membranes line and enclose several body cavities, known as serous cavities, where they secrete a lubricating fluid which reduces friction from muscle movement...

 --- pericardium

Pericardium

The pericardium is a double-walled sac that contains the heart and the roots of the great vessels.-Layers:...

 --- peritoneum

Peritoneum

The peritoneum is the serous membrane that forms the lining of the abdominal cavity or the coelom — it covers most of the intra-abdominal organs — in amniotes and some invertebrates...

 --- pleura

--- Muscle

Muscle

Muscle is a contractile tissue of animals and is derived from the mesodermal layer of embryonic germ cells. Muscle cells contain contractile filaments that move past each other and change the size of the cell. They are classified as skeletal, cardiac, or smooth muscles. Their function is to...

s

--- muscle, skeletal --- sarcoplasmic reticulum --- muscle, smooth --- muscle, smooth, vascular --- tunica media

Tunica media

The tunica media is the middle layer of an artery or vein.-Artery:It is made up of smooth muscle cells and elastic tissue...

 --- myometrium

Myometrium

The myometrium is the middle layer of the uterine wall, consisting mainly of uterine smooth muscle cells , but also of supporting stromal and vascular tissue...

 --- myocardium

--- nerve tissue

--- ependyma

Ependyma

Ependyma is the thin epithelial membrane lining the ventricular system of the brain and the spinal cord. Ependyma is one of the four types of neuroglia in the central nervous system. It is involved in the production of cerebrospinal fluid ....

 --- myelin sheath --- neurilemma --- ranvier's nodes --- neurilemma

--- surgically-created structures

--- colonic pouches --- skeletal muscle ventricle --- stoma

Stoma (medicine)

A stoma is an opening , either natural or surgically created, which connects a portion of the body cavity to the outside environment...

s --- surgical flaps --- urinary reservoirs, continent