組織形成

関: histogenetic

Wikipedia preview

出典(authority):フリー百科事典『ウィキペディア（Wikipedia）』「2016/09/10 18:34:59」(JST)

wiki en

Histogenesis is the formation of different tissues from undifferentiated cells.^[1] These cells are constituents of three primary germ layers, the endoderm, mesoderm, and ectoderm. The science of the microscopic structures of the tissues formed within histogenesis is termed histology.

Germ layers

Gastrulation of a diploblast: The formation of germ layers from a (1) blastula to a (2) gastrula. Some of the ectoderm cells (orange) move inward forming the endoderm (red).

A germ layer is a collection of cells, formed during animal and mammalian embryogenesis. Germ layers are typically pronounced within vertebrate organisms; however, animals or mammals more complex than sponges (eumetazoans and agnotozoans) produce two or three primary tissue layers. Animals with radial symmetry, such as cnidarians, produce two layers, called the ectoderm and endoderm. Therefore, they are diploblastic. Animals with bilateral symmetry produce a third layer in-between called mesoderm, making them triploblastic. Germ layers will eventually give rise to all of an animal’s or mammal's tissues and organs through a process called organogenesis.

Endoderm

The endoderm is one of the germ to penes layers formed during animal embryogenesis. Cells migrating inward along the archenteron form the inner layer of the gastrula, which develops into the endoderm. Initially, the endoderm consists of flattened cells, which subsequently become columnar.

Mesoderm

The mesoderm germ layer forms in the embryos of animals and mammals more complex than cnidarians, making them triploblastic. During gastrulation, some of the cells migrating inward to form the endoderm form an additional layer between the endoderm and the ectoderm. A theory suggests that this key innovation evolved hundreds of millions of years ago and led to the evolution of nearly all large, complex animals. The formation of a mesoderm led to the formation of a coelom. Organs formed inside a coelom can freely move, grow, and develop independently of the body wall while fluid cushions and protects them from shocks.

Ectoderm

The ectoderm is the start of a tissue that covers the body surfaces. It emerges first and forms from the outermost of the germ layers.

Production

The endoderm produces tissue within the lungs, thyroid, and pancreas. The mesoderm aids in the production of cardiac muscle, skeletal muscle, smooth muscle, tissues within the kidneys, and red blood cells. The ectoderm produces tissues within the epidermis and aids in the formation of neurons within the brain, and melanocytes.

The proceeding graph represents the products produced by the three germ layers.

Germ Layer	Category	Product
Endoderm	General^[2]	Gastrointestinal tract
Endodern	General	Respiratory tract
Endoderm	General	Endocrine glands and organs (liver and pancreas)
Mesoderm	General	Bones
Mesoderm	General	Most of the Circulatory system
Mesoderm	General	Connective tissues of the gut and integuments
Mesoderm	General	Excretory Tract
Mesoderm	General	Mesenchyme
Mesoderm	General	Mesothelium
Mesoderm	General	Muscles
Mesoderm	General	Peritoneum
Mesoderm	General	Reproductive System
Mesoderm	General	Urinary System
Mesoderm	Vertebrate^[3]	Chordamesoderm
Mesoderm	Vertebrate	Paraxial mesoderm
Mesoderm	Vertebrate	Intermediate mesoderm
Mesoderm	Vertebrate	Lateral plate mesoderm
Ectoderm	General	Nervous system
Ectoderm	General	Outer part of integument
Ectoderm	Vertebrate	Skin (along with glands, hair, nails)
Ectoderm	Vertebrate	Epithelium of the mouth and nasal cavity
Ectoderm	Vertebrate	Lens and cornea of the eye
Ectoderm	Vertebrate	Melanocytes
Ectoderm	Vertebrate	Peripheral nervous system
Ectoderm	Vertebrate	Facial cartilage
Ectoderm	Vertebrate	Dentin (in teeth)
Ectoderm	Vertebrate	Brain (rhombencephalon, mesencephalon and prosencephalon)
Ectoderm	Vertebrate	Spinal cord and motor neurons
Ectoderm	Vertebrate	Retina
Ectoderm	Vertebrate	Posterior pituitary

References

^ histogenesis definition - Dictionary - MSN Encarta. Archived from the original on 2009-10-31.
^ The General category denotes that all or most of the animals containing this layer produce the adjacent product.
^ The Vertebrate category denotes that all or most of the vertebrates containing this layer produce the adjacent product.

Microsoft Corporation. Histogenesis (Archived 2009-10-31). Encarta World English Dictionary (North American Edition). URL accessed on 14 May 2005.
Evers, Christine A., Lisa Starr. Biology:Concepts and Applications. 6th ed. United States:Thomson, 2006. ISBN 978-0-534-46224-6.

External links

(English) Derivatives of the Ectoderm
(English) Derivatives of the Endoderm and Mesoderm

UpToDate Contents

全文を閲覧するには購読必要です。 To read the full text you will need to subscribe.

1. 隆起性皮膚線維肉腫：疫学、病因、臨床症状、診断、および病期分類 dermatofibrosarcoma protuberans epidemiology pathogenesis clinical presentation diagnosis and staging
2. 縦隔および後腹膜を含む性腺外胚細胞腫瘍 extragonadal germ cell tumors involving the mediastinum and retroperitoneum
3. 骨の巨大細胞腫瘍 giant cell tumor of bone
4. 松果体部腫瘍 pineal gland masses
5. 肺の炎症性筋線維芽細胞性腫瘍（形質細胞肉芽腫） inflammatory myofibroblastic tumor plasma cell granuloma of the lung

English Journal

Lymphoepithelial cyst with sebaceous glands of the pancreas: a case report.

Maehira H1, Shiomi H2, Murakami K2, Akabori H2, Naka S2, Ishida M3, Tani M2.
Surgical case reports.Surg Case Rep.2016 Dec;2(1):98. doi: 10.1186/s40792-016-0228-4. Epub 2016 Sep 15.
BACKGROUND: Lymphoepithelial cyst (LEC) of the pancreas is a rare benign tumor. LEC with sebaceous glands of the pancreas is extremely rare, and its histogenesis remains unclear.CASE PRESENTATION: We present a 66-year-old man with an incidental finding of a cystic lesion at the neck of the pancreas.
PMID 27638387

Chordoid Glioma of Third Ventricle With an Epidermoid Cyst: Coexistence or Common Histogenesis?

Poyuran R1, Mahadevan A2, Sagar BK1, Saini J3, Srinivas D4.
International journal of surgical pathology.Int J Surg Pathol.2016 Oct;24(7):663-7. doi: 10.1177/1066896916650256. Epub 2016 May 18.
Chordoid glioma (CG) is a World Health Organization classified grade II tumor located exclusively in the region of anterior third ventricle. Association of CG with other lesions is extremely rare. We report a case of CG in a 45-year-old male coexisting with an epidermoid cyst in the third ventricle.
PMID 27194402

Spheroidal Organoids Reproduce Characteristics of Longitudinal Depth Zones in Bovine Articular Cartilage.

Mizuno S1, Takada E, Fukai N.
Cells, tissues, organs.Cells Tissues Organs.2016 Sep 22. [Epub ahead of print]
Articular cartilage has multiple histologically distinct longitudinal depth zones. Development and pathogenesis occur throughout these zones. Cartilage explants, monolayer cell culture and reconstituted 3-dimensional cell constructs have been used for investigating mechanisms of pathophysiology in a
PMID 27654347

Japanese Journal

Statistical analyses in trials for the comprehensive understanding of organogenesis and histogenesis in humans and mice

The journal of biochemistry 159(6), 553-561, 2016-06
NAID 40020869341

症例報告多臓器転移により急速な転帰を辿ったAFP産生を伴う未分化な卵巣癌の1例

東京産科婦人科学会会誌 63(3), 555-559, 2014-07
NAID 40020186429

病理から診た外傷歯 : 象牙質・歯髄複合体

日本外傷歯学会雑誌 10(1), 1-7, 2014
NAID 40020386034

「histogenetic」

　　[★]

組織形成の

関: histogenesis

「組織形成」

　　[★]

英: histogenesis、histogenetic

[1] histogenesis definition - Dictionary - MSN Encarta. Archived from the original on 2009-10-31.

[2] The General category denotes that all or most of the animals containing this layer produce the adjacent product.

[3] The Vertebrate category denotes that all or most of the vertebrates containing this layer produce the adjacent product.

匿名

検索

案内

案内

histogenesis