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Gland - "Cram It" (Official Video)
Gland - "Cram It" (Official Video)
Published: 2016/10/22
Channel: Community Records
What is a gland? - Human Anatomy | Kenhub
What is a gland? - Human Anatomy | Kenhub
Published: 2016/01/24
Channel: Kenhub
Removal of Salivary Gland Stone
Removal of Salivary Gland Stone
Published: 2016/11/12
Channel: ENT Compilations
Removing my own salivary gland stone
Removing my own salivary gland stone
Published: 2016/05/20
Channel: Dustin Koenning
How Does Pituitary Gland Work? Hormones of Hypophysis Functions & Disorders Animation -TSH FSH Video
How Does Pituitary Gland Work? Hormones of Hypophysis Functions & Disorders Animation -TSH FSH Video
Published: 2016/03/11
Channel: AniMed
Exocrine Gland and Endocrine Glands
Exocrine Gland and Endocrine Glands
Published: 2010/05/04
Channel: TutorVista
How to Express Your Dog
How to Express Your Dog's Anal Glands at Home - Veterinarian Recommended Way (GRAPHIC)
Published: 2017/07/10
Channel: Vetnique Pet Products
Composite Skin Model - Glands
Composite Skin Model - Glands
Published: 2008/12/29
Channel: drbobrd
CMP Products - T3CDS (Triton) Cable Gland - SWA DIRECT
CMP Products - T3CDS (Triton) Cable Gland - SWA DIRECT
Published: 2010/06/30
Channel: CMP Products
Parotid (Salivary) Gland - Anatomy, Innervation & Function - Human Anatomy | Kenhub
Parotid (Salivary) Gland - Anatomy, Innervation & Function - Human Anatomy | Kenhub
Published: 2014/08/11
Channel: Kenhub
GLand Jungle Surf Camp
GLand Jungle Surf Camp
Published: 2006/04/28
Channel: Alexandre Ribas
Kopex-EX™ Double Compression Cable Gland
Kopex-EX™ Double Compression Cable Gland
Published: 2014/11/06
Channel: Thomas & Betts
Café de gland tuto pour le réaliser chez soi ou dans la nature
Café de gland tuto pour le réaliser chez soi ou dans la nature
Published: 2016/11/02
Channel: css julien noel
Pineal gland (glandula pinealis) - Human Anatomy | Kenhub
Pineal gland (glandula pinealis) - Human Anatomy | Kenhub
Published: 2017/03/07
Channel: Kenhub
Detox Your Pineal Gland (Decalcify) in 1 Hour: 3rd Eye Activation
Detox Your Pineal Gland (Decalcify) in 1 Hour: 3rd Eye Activation
Published: 2014/10/22
Channel: Meditational State
10000 Hz Full Restore⎪2675 Hz Pineal Gland Resonator⎪528 Hz Miracle Tone⎪Advanced Slow Shamanic Drum
10000 Hz Full Restore⎪2675 Hz Pineal Gland Resonator⎪528 Hz Miracle Tone⎪Advanced Slow Shamanic Drum
Published: 2017/09/01
Channel: LOKOS TV NOW MEDITATION MUSIC
PIneal Gland and Long Hair
PIneal Gland and Long Hair
Published: 2016/04/24
Channel: Light Worker
[SHOCKING NEWS] The Pineal Gland - The Greatest Cover Up In History
[SHOCKING NEWS] The Pineal Gland - The Greatest Cover Up In History
Published: 2014/01/03
Channel: Burhaan Pattel
How To Activate Your Pineal Gland: The Science of Third Eye Awakening
How To Activate Your Pineal Gland: The Science of Third Eye Awakening
Published: 2016/06/21
Channel: blackmagik363
PINEAL GLAND Activation Frequency 936Hz: BINAURAL BEATS Meditation Music Third Eye Opening
PINEAL GLAND Activation Frequency 936Hz: BINAURAL BEATS Meditation Music Third Eye Opening
Published: 2015/01/31
Channel: NuMeditationMusic
Electrical cable gland connector connect 01
Electrical cable gland connector connect 01
Published: 2016/08/03
Channel: kanda samy
The Truth About Your Pineal Gland
The Truth About Your Pineal Gland
Published: 2012/01/08
Channel: Truthzonetvcom
Heal & Open 3rd Eye in 45 minutes: WARNING! Powerful Pineal Gland Activation
Heal & Open 3rd Eye in 45 minutes: WARNING! Powerful Pineal Gland Activation
Published: 2017/06/02
Channel: Channel Positivity
Reasons Why You SHOULDN
Reasons Why You SHOULDN'T Open Your Pineal Gland
Published: 2016/06/04
Channel: Universal Frequencies
Les glands des chênes se mangent
Les glands des chênes se mangent
Published: 2017/09/23
Channel: Le Chemin de la Nature
963Hz  Miracle Healing Tone ➤ Strengthen Third Eye & Cleanse Pineal Gland - Third Eye DETOX Pineal
963Hz Miracle Healing Tone ➤ Strengthen Third Eye & Cleanse Pineal Gland - Third Eye DETOX Pineal
Published: 2016/11/20
Channel: PowerThoughts Meditation Club
Solfeggio 852 & 963 Hz ➤ Cleanse Pineal Gland & Open Third Eye | Native Flute & Drums
Solfeggio 852 & 963 Hz ➤ Cleanse Pineal Gland & Open Third Eye | Native Flute & Drums
Published: 2016/01/18
Channel: PowerThoughts Meditation Club
The Causes of Pineal Gland Calcification (Life-Changing Information) [Part-1]
The Causes of Pineal Gland Calcification (Life-Changing Information) [Part-1]
Published: 2016/09/07
Channel: Transcending Vibrations
Solfeggio 852Hz + 963Hz | Pineal Gland Activator ⧊ Awakens Intuition
Solfeggio 852Hz + 963Hz | Pineal Gland Activator ⧊ Awakens Intuition
Published: 2016/09/05
Channel: Meditative Mind
Instantly Open Your Third Eye and Activate Your Pineal Gland (Technique and Meditation)
Instantly Open Your Third Eye and Activate Your Pineal Gland (Technique and Meditation)
Published: 2017/06/27
Channel: Aaron Doughty
528Hz & 936Hz: Open Your Third Eye ➤ Activate Pineal Gland |  DNA Healing -  Miracle Tones
528Hz & 936Hz: Open Your Third Eye ➤ Activate Pineal Gland | DNA Healing - Miracle Tones
Published: 2016/07/21
Channel: PowerThoughts Meditation Club
936Hz Pineal Gland Activation | Third Eye Opening Solfeggio Frequency - Binaural Beats Meditation
936Hz Pineal Gland Activation | Third Eye Opening Solfeggio Frequency - Binaural Beats Meditation
Published: 2016/11/23
Channel: Good Vibes - Binaural Beats
Secrets Of The Pineal Gland Revealed / How Fluoride Is Used As A Chemical Attack
Secrets Of The Pineal Gland Revealed / How Fluoride Is Used As A Chemical Attack
Published: 2017/09/20
Channel: The Alex Jones Channel
How to Decalcify Your Pineal Gland II Third Eye Science (10 Signs Your Third Eye is Opening)
How to Decalcify Your Pineal Gland II Third Eye Science (10 Signs Your Third Eye is Opening)
Published: 2017/12/08
Channel: Infinite Waters (Diving Deep)
PINEAL GLAND Activation Frequency׃ Brow Chakra Meditation Music Third Eye Opening
PINEAL GLAND Activation Frequency׃ Brow Chakra Meditation Music Third Eye Opening
Published: 2016/04/27
Channel: Interdreamer
Warning ! Extremely Powerful Lucid Dreaming  With Third Eye Opening - Pineal Gland Activation
Warning ! Extremely Powerful Lucid Dreaming With Third Eye Opening - Pineal Gland Activation
Published: 2015/10/22
Channel: Relaxing Binaural Beats & Meditation Music
How To Open & Activate Your Pineal Gland, Third Eye (Ajna) Chakra ~ 3 POWERFUL Techniques!
How To Open & Activate Your Pineal Gland, Third Eye (Ajna) Chakra ~ 3 POWERFUL Techniques!
Published: 2014/12/02
Channel: Silent Truth
Pineal Gland Healer (v2) - Decalcify, Activate, and Heal the Pineal Gland - Binaural Beats
Pineal Gland Healer (v2) - Decalcify, Activate, and Heal the Pineal Gland - Binaural Beats
Published: 2016/03/14
Channel: Magnetic Minds
Adrenal Glands 1
Adrenal Glands 1
Published: 2016/10/26
Channel: PMT biology
288 Hz - Extremely Powerful Third Eye Pineal Gland Activation
288 Hz - Extremely Powerful Third Eye Pineal Gland Activation
Published: 2015/07/18
Channel: Magnetic Minds
[DOCUMENTARY] Pineal Gland Consciousness & Sacred Geometry
[DOCUMENTARY] Pineal Gland Consciousness & Sacred Geometry
Published: 2014/10/10
Channel: TLC Brain
Open Your 3rd Eye in 7 Seconds PINEAL GLAND EXERCISES
Open Your 3rd Eye in 7 Seconds PINEAL GLAND EXERCISES
Published: 2015/01/24
Channel: Psychic Spirit Fairie
DMT SPACE Within Spirit Psychedelic Trip 963Hz Pineal Gland Activation | Deep Sleep Meditation Music
DMT SPACE Within Spirit Psychedelic Trip 963Hz Pineal Gland Activation | Deep Sleep Meditation Music
Published: 2017/05/27
Channel: LOKOS TV NOW MEDITATION MUSIC
The Truth about Fluoride! (The Pineal Gland, Drinking Water, & How to Protect Yourself)
The Truth about Fluoride! (The Pineal Gland, Drinking Water, & How to Protect Yourself)
Published: 2016/02/22
Channel: Koi Fresco
UNLOCK POWER⎪DMT Activation Frequency⎪2675 Hz Pineal Gland Resonator⎪432 Hz Ultra Healing Vibration
UNLOCK POWER⎪DMT Activation Frequency⎪2675 Hz Pineal Gland Resonator⎪432 Hz Ultra Healing Vibration
Published: 2017/12/10
Channel: LOKOS TV NOW MEDITATION MUSIC
Solfeggio 963Hz | Sleep Music | Pineal Gland Activator
Solfeggio 963Hz | Sleep Music | Pineal Gland Activator
Published: 2016/09/15
Channel: Meditative Mind
Endocrine System, part 1 - Glands & Hormones: Crash Course A&P #23
Endocrine System, part 1 - Glands & Hormones: Crash Course A&P #23
Published: 2015/06/22
Channel: CrashCourse
5 Foods to Decalcify Your Pineal Gland (Third Eye Activation)
5 Foods to Decalcify Your Pineal Gland (Third Eye Activation)
Published: 2015/06/14
Channel: Infinite Waters (Diving Deep)
DMT & The Mysteries of The Pineal Gland
DMT & The Mysteries of The Pineal Gland
Published: 2014/01/30
Channel: cosmiccontinuum
How To Open Your Pineal Gland
How To Open Your Pineal Gland
Published: 2015/06/03
Channel: William Mount
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WIKIPEDIA ARTICLE

From Wikipedia, the free encyclopedia
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Gland
Gray1026.png
Human submaxillary gland. At the right is a group of mucous alveoli, at the left a group of serous alveoli.
Details
Identifiers
Latin glandula
Code TH H2.00.02.0.02002
TH H2.00.02.0.02002
Anatomical terminology

A gland is a group of cells[1] in an animal's body that synthesizes substances (such as hormones) for release into the bloodstream (endocrine gland) or into cavities inside the body or its outer surface (exocrine gland).

Structure[edit]

Development[edit]

This image shows some of the various possible glandular arrangements. These are the simple tubular, simple branched tubular, simple coiled tubular, simple acinar, and simple branched acinar glands.
This image shows some of the various possible glandular arrangements. These are the compound tubular, compound acinar, and compound tubulo-acinar glands.

Every gland is formed by an ingrowth from an epithelial surface. This ingrowth may in the beginning possess a tubular structure, but in other instances glands may start as a solid column of cells which subsequently becomes tubulated.[2]

As growth proceeds, the column of cells may divide or give off offshoots, in which case a compound gland is formed. In many glands, the number of branches is limited, in others (salivary, pancreas) a very large structure is finally formed by repeated growth and sub-division. As a rule, the branches do not unite with one another, but in one instance, the liver, this does occur when a reticulated compound gland is produced. In compound glands the more typical or secretory epithelium is found forming the terminal portion of each branch, and the uniting portions form ducts and are lined with a less modified type of epithelial cell.[2]

Glands are classified according to their shape.

  • If the gland retains its shape as a tube throughout it is termed a tubular gland.
  • In the second main variety of gland the secretory portion is enlarged and the lumen variously increased in size. These are termed alveolar or saccular glands.[2]

Function[edit]

Glands are divided based on their function into two groups:

Here is a diagram that shows the differences between Endocrine and Exocrine glands. The major difference is that Exocrine glands secrete substances out of the body and Endocrine glands secrete substances into capillaries and blood vessels.

Endocrine glands[edit]

Endocrine glands secrete substances that circulate through the blood stream. These glands secrete their products through the basal lamina into the blood stream and lack a duct system. These glands often secrete hormones, and play an important role in maintaining homeostasis. The pineal gland, thymus gland, pituitary gland, thyroid gland, and the two adrenal glands are all endocrine glands.

Exocrine glands[edit]

Exocrine glands secrete their products through a duct onto an outer surface of the body, such as the skin or the gastrointestinal tract. Secretion is directly onto the apical surface. The glands in this group can be divided into three groups:

  • Apocrine glands a portion of the secreting cell's body is lost during secretion. Apocrine gland is often used to refer to the apocrine sweat glands, however it is thought that apocrine sweat glands may not be true apocrine glands as they may not use the apocrine method of secretion. e.g. mammary gland, sweat gland of arm pit, pubic region, skin around anus, lips, nipples.
  • Holocrine glands the entire cell disintegrates to secrete its substances (e.g., sebaceous glands), meibomian and zeis glands.
  • Merocrine glands cells secrete their substances by exocytosis (e.g., mucous and serous glands). Also called "eccrine". e.g. max sweat gland of humans, goblet cells, salivary gland, tear gland, intestinal glands.

The type of secretory product of exocrine glands may also be one of three categories:

Clinical significance[edit]

Adenosis is any disease of a gland. The diseased gland has abnormal formation or development of glandular tissue which is sometimes tumorous.[3]

Other's animals[edit]

Additional images[edit]

References[edit]

  1. ^ https://www.medicinenet.com/script/main/art.asp?articlekey=3594
  2. ^ a b c  One or more of the preceding sentences incorporates text from a publication now in the public domainChisholm, Hugh, ed. (1911). "Epithelial, Endothelial and Glandular Tissues". Encyclopædia Britannica. 9 (11th ed.). Cambridge University Press. pp. 705–707. 
  3. ^ Alberts, Daniel (2012). Dorland's illustrated medical dictionary (32nd ed.). Philadelphia, PA: Saunders/Elsevier. p. 30. ISBN 978-1-4160-6257-8. 

External links[edit]

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