Simple columnar epithelium

Information about Simple columnar epithelium

Vertical section of a villus from the dog’s small intestine. X 80. (Simple columnar epithelium labeled at right, third from top.)
Transverse section of a villus, from the human intestine. X 350.
a. Basement membrane, here somewhat shrunken away from the epithelium.
b. Lacteal.
c. Columnar epithelium.
d. Its striated border.
e. Goblet cells.
f. Leucocytes in epithelium.
f’. Leucocytes below epithelium.
g. Bloodvessels.
h. Muscle cells cut across.
The simple columnar epithelium is made up of one layer of cells that are relatively thick and protective of the underlying tissues due to its elongated shape.

It lines the uterus as well as most organs of the digestive tract including the stomach and large intestine.

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Simple columnar epithelia are further divided into two categories: nonciliated and ciliated.

Nonciliated

Nonciliated columnar epithelia do not have cilia, and are found in the gastrointestinal tract and the gallbladder where they perform secretion and absorption.

Ciliated

Ciliated columnar epithelia move mucus and other substances via cilia, and are found in the upper respiratory tract, the Fallopian tubes, the uterus, and the central part of the spinal cord.

Ciliated columnar epithelium lines the lumen of the uterine tube, where currents generated by the cilia propel the egg cell, toward the uterus.

Additional images


Types of epithelium.

Histology of gallbladder.

Layers of stomach wall.

Vertical section of mucous membrane of human uterus.

skin of slug Deroceras leave

lining of gallbladder


References

External links

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Histology: epithelial tissue
Villus (Latin: "shaggy hair"[1], plural villi) can refer to:
  • Intestinal villus. This is the most common meaning when not more precisely specified
  • Chorionic villi, found on the surface of the outermost membrane (the chorion) of the fetus

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In anatomy, the intestine is the segment of the alimentary canal extending from the stomach to the anus and, in humans and other mammals, consists of two segments, the small intestine and the large intestine.
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basement membrane is a structure that supports overlying epithelial or endothelial cells.

Composition

The basement membrane consists of an electron-dense membrane called the lamina densa, about 30–70 nanometers in thickness, and an underlying network of reticular
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A lacteal is a lymphatic capillary that absorbs dietary fats in the villi of the small intestine.

The combination of fat and lymph in the lacteals is milky in appearance and called chyle.
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Columnar epithelia are epithelial cells whose heights are at least twice their width. Columnar epithelia are divided into simple (or unilayered), and stratified (or multi-layered).
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Goblet cells are glandular simple columnar epithelial cells whose sole function is to secrete mucus.

The majority of the cell's cytoplasm is occupied by mucinogen granules, except at the bottom.
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White blood cells or leukocytes are cells of the immune system which defend the body against both infectious disease and foreign materials. Several different and diverse types of leukocytes exist, but they are all produced and derived from a multipotent cell in the bone
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The blood vessels are part of the cardiovascular system and function to transport blood throughout the body. The most important types, arteries and veins, carry blood away from or towards the heart, respectively.
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MUSCLE (multiple sequence comparison by log-expectation) is public domain, multiple sequence alignment software for protein and nucleotide sequences.
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uterus or womb is the major female reproductive organ of most mammals, including humans. One end, the cervix, opens into the vagina; the other is connected on both sides to the fallopian tubes.
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gastrointestinal tract (GI tract), also called the digestive tract, or the alimentary canal, is the system of organs within multicellular animals that takes in food, digests it to extract energy and nutrients, and expels the remaining waste.
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In anatomy, the stomach is a bean-shaped hollow muscular organ of the gastrointestinal tract involved in the second phase of digestion, following mastication. The word stomach is derived from the Latin stomachus, which derives from the Greek word
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The large intestine, an organ which is now more commonly referred to by its Greek name, the colon, is the last part of the digestive system: the final stage of the alimentary canal in vertebrate animals.
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cilium (plural cilia) is an organelle found in eukaryotic cells. Cilia are thin, tail-like projections extending approximately 5–10 micrometers outwards from the cell body.
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gastrointestinal tract (GI tract), also called the digestive tract, or the alimentary canal, is the system of organs within multicellular animals that takes in food, digests it to extract energy and nutrients, and expels the remaining waste.
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The gallbladder (or cholecyst, sometimes gall bladder) is a pear-shaped organ that stores about 50 ml of bile (or "gall") until the body needs it for digestion.
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Secretion is the process of segregating, elaborating, and releasing chemicals from a cell, or a secreted chemical substance or amount of substance.

Eukaryotic cells have a highly evolved process of secretion.
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Absorption may refer to:
  • Absorption (chemistry), absorption of particles of gas or liquid in liquid or solid material
  • Absorption (cooking), a method in cooking in which a food (such as rice) takes up the liquid in which it is immersed

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highly specialized aspect of its associated subject.
Please help [ improve this article] by adding more general information.


Mucus is a slippery secretion of the lining of the mucous membranes in the body.
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In humans the respiratory tract is the part of the anatomy that has to do with the process of respiration.

The respiratory tract is divided into 3 segments:
  • Upper respiratory tract: nose and nasal passages, paranasal sinuses, and throat or pharynx

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The Fallopian tubes, also known as oviducts, uterine tubes, and salpinges (singular salpinx) are two very fine tubes leading from the ovaries of female mammals into the uterus.
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uterus or womb is the major female reproductive organ of most mammals, including humans. One end, the cervix, opens into the vagina; the other is connected on both sides to the fallopian tubes.
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spinal chord is a thin, tubular bundle of nerves that is an extension of the central nervous system from the brain and is enclosed in and protected by the bony vertebral column.
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Lumen can mean:
  • Lumen (unit), the SI unit of luminous flux
  • Lumen (anatomy), the cavity or channel within a tubular structure
  • Thylakoid lumen, the inner membrane space of the chloroplast

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The Fallopian tubes, also known as oviducts, uterine tubes, and salpinges (singular salpinx) are two very fine tubes leading from the ovaries of female mammals into the uterus.
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cilium (plural cilia) is an organelle found in eukaryotic cells. Cilia are thin, tail-like projections extending approximately 5–10 micrometers outwards from the cell body.
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ovum (plural ova) is a haploid female reproductive cell or gamete. The word is derived from Latin, meaning egg or egg cell. Both animals and embryophytes have ova. The term ovule
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uterus or womb is the major female reproductive organ of most mammals, including humans. One end, the cervix, opens into the vagina; the other is connected on both sides to the fallopian tubes.
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The gallbladder (or cholecyst, sometimes gall bladder) is a pear-shaped organ that stores about 50 ml of bile (or "gall") until the body needs it for digestion.
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In anatomy, the stomach is a bean-shaped hollow muscular organ of the gastrointestinal tract involved in the second phase of digestion, following mastication. The word stomach is derived from the Latin stomachus, which derives from the Greek word
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