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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
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
Removal of Salivary Gland Stone
Removal of Salivary Gland Stone
Published: 2016/11/12
Channel: ENT Compilations
Exocrine Gland and Endocrine Glands
Exocrine Gland and Endocrine Glands
Published: 2010/05/04
Channel: TutorVista
8.2.3 Thyroid Gland Structure and Function
8.2.3 Thyroid Gland Structure and Function
Published: 2011/08/26
Channel: braingenie
Adrenal Glands 1
Adrenal Glands 1
Published: 2016/10/26
Channel: PMT biology
GLand Jungle Surf Camp
GLand Jungle Surf Camp
Published: 2006/04/28
Channel: Alexandre Ribas
Pineal gland (glandula pinealis) - Human Anatomy | Kenhub
Pineal gland (glandula pinealis) - Human Anatomy | Kenhub
Published: 2017/03/07
Channel: Kenhub
CMP Products - T3CDS (Triton) Cable Gland - SWA DIRECT
CMP Products - T3CDS (Triton) Cable Gland - SWA DIRECT
Published: 2010/06/30
Channel: CMP Products
What Happened When I Started to Decalcify My Pineal Gland! ** Only For The Open Minded**
What Happened When I Started to Decalcify My Pineal Gland! ** Only For The Open Minded**
Published: 2017/02/06
Channel: Mr. In10sity
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)
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
Thyroid Gland Examination - OSCE Exam Demonstration
Thyroid Gland Examination - OSCE Exam Demonstration
Published: 2015/02/01
Channel: OSCE PASS
Solfeggio 963Hz | Sleep Music | Pineal Gland Activator
Solfeggio 963Hz | Sleep Music | Pineal Gland Activator
Published: 2016/09/15
Channel: Meditative Mind
Hawke International - 710, 753 and 755 Cable Gland Installation
Hawke International - 710, 753 and 755 Cable Gland Installation
Published: 2014/03/20
Channel: Cable Systems Limited
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
Endocrinology - Adrenal Gland Hormones
Endocrinology - Adrenal Gland Hormones
Published: 2017/01/16
Channel: Armando Hasudungan
Electrical cable gland connector connect 01
Electrical cable gland connector connect 01
Published: 2016/08/03
Channel: kanda samy
963 Hz | Pineal Gland Activation | Solfeggio Sleep Music | 9 Hours
963 Hz | Pineal Gland Activation | Solfeggio Sleep Music | 9 Hours
Published: 2017/03/11
Channel: Meditative Mind
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: Wonderful Meditation Music
Pineal Gland Activation ~ Brainwave Binaural Beat Full Length HD Meditation
Pineal Gland Activation ~ Brainwave Binaural Beat Full Length HD Meditation
Published: 2013/02/05
Channel: Source Vibrations
The Pineal Gland (Science, Spirituality, DMT & Decalcification)
The Pineal Gland (Science, Spirituality, DMT & Decalcification)
Published: 2015/02/26
Channel: Koi Fresco
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
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
8 Years Old Boy Talks About Pineal Gland The Third Eye! And TV Brainwash  You Need To Hear This!  ra
8 Years Old Boy Talks About Pineal Gland The Third Eye! And TV Brainwash You Need To Hear This! ra
Published: 2016/05/10
Channel: The Awesome Info
2675 Hz Music for the Pineal Gland: Powerful Crystal Resonator | Tibetan Bowls Slow Drum Water Sound
2675 Hz Music for the Pineal Gland: Powerful Crystal Resonator | Tibetan Bowls Slow Drum Water Sound
Published: 2017/07/04
Channel: LOKOS TV NOW MEDITATION MUSIC
432 Hz Open Your Third Eye | Activate Your Pineal Gland - Third Eye Opening | 3rd Eye Activation
432 Hz Open Your Third Eye | Activate Your Pineal Gland - Third Eye Opening | 3rd Eye Activation
Published: 2017/06/29
Channel: PowerThoughts Meditation Club
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
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
How to Decalcify Your Pineal Gland, The Science of The Pineal Gland and Third Eye Activation
How to Decalcify Your Pineal Gland, The Science of The Pineal Gland and Third Eye Activation
Published: 2013/07/29
Channel: Infinite Waters (Diving Deep)
Solfeggio 852Hz + 963Hz | Pineal Gland Activator ⧊ Awakens Intuition
Solfeggio 852Hz + 963Hz | Pineal Gland Activator ⧊ Awakens Intuition
Published: 2016/09/05
Channel: Meditative Mind
Solfeggio 963 Hz ◈ Pineal Gland Activation | Pure Miracle Tones ✿ S4T9
Solfeggio 963 Hz ◈ Pineal Gland Activation | Pure Miracle Tones ✿ S4T9
Published: 2016/12/24
Channel: Meditative Mind
Open Third Eye - Cleansing Chakra Sleep Music | Cleanse, Balance Pineal Gland Open Brow Chakra 963Hz
Open Third Eye - Cleansing Chakra Sleep Music | Cleanse, Balance Pineal Gland Open Brow Chakra 963Hz
Published: 2017/02/06
Channel: PowerThoughts Meditation Club
Pineal Gland Activation Secrets | Third Eye Conspiracy
Pineal Gland Activation Secrets | Third Eye Conspiracy
Published: 2014/01/01
Channel: esotericcosmos
PINEAL GLAND Activation Frequency:  Brow Chakra Meditation Music Third Eye Opening
PINEAL GLAND Activation Frequency: Brow Chakra Meditation Music Third Eye Opening
Published: 2015/11/17
Channel: Spiritual Moment
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
ACTIVATE PINEAL GLAND FAST : POWERFUL PINEAL GLAND BINAURAL BEATS MEDITATION MUSIC
ACTIVATE PINEAL GLAND FAST : POWERFUL PINEAL GLAND BINAURAL BEATS MEDITATION MUSIC
Published: 2017/06/05
Channel: SONIC ELEVATOR - POWERFUL BRAINWAVE MEDITATIONS
Height Increase _ Till 35! | (Pituitary Gland Meditation Height Growth) | Grow Tall SuperWowStyle
Height Increase _ Till 35! | (Pituitary Gland Meditation Height Growth) | Grow Tall SuperWowStyle
Published: 2016/08/08
Channel: superWOWstyle!
Astral Projection | Out Of body Experience Music - Pineal Gland Awakening | 4.5Hz & 963Hz OBE Music
Astral Projection | Out Of body Experience Music - Pineal Gland Awakening | 4.5Hz & 963Hz OBE Music
Published: 2017/01/19
Channel: ZenLifeRelax
Express Anal Glands
Express Anal Glands
Published: 2016/11/09
Channel: Mobile Paw Spa
Facts about Pineal Gland
Facts about Pineal Gland
Published: 2015/11/12
Channel: Dr. Zulfiquar Ahmed
Parotid (Salivary) Gland - Anatomy, Innervation & Function - Human Anatomy | Kenhub
Parotid (Salivary) Gland - Anatomy, Innervation & Function - Human Anatomy | Kenhub
Published: 2014/08/11
Channel: Kenhub
Natural Treatment for Enlarged Prostate Gland
Natural Treatment for Enlarged Prostate Gland
Published: 2014/05/19
Channel: Dr. Vikram Chauhan
PIneal Gland and Long Hair
PIneal Gland and Long Hair
Published: 2016/04/24
Channel: Light Worker
OPEN THIRD EYE CHAKRA - Powerful Pineal Gland Activation Music - Chakra Meditation & Healing Music
OPEN THIRD EYE CHAKRA - Powerful Pineal Gland Activation Music - Chakra Meditation & Healing Music
Published: 2017/06/07
Channel: Meditative Mind
2675 Hz Music⎪Pineal Gland Vibration⎪Powerful Crystal Resonator⎪Tibetan Bowls Slow Drums Sea Waves
2675 Hz Music⎪Pineal Gland Vibration⎪Powerful Crystal Resonator⎪Tibetan Bowls Slow Drums Sea Waves
Published: 2017/08/15
Channel: LOKOS TV NOW MEDITATION MUSIC
How to Open Your Pineal Gland || The Science of the Third eye & DNA Activation!
How to Open Your Pineal Gland || The Science of the Third eye & DNA Activation!
Published: 2016/06/16
Channel: Infinite Waters (Diving Deep)
PINEAL GLAND Activation Frequency 936hz / Christ Consciousness Pyramid Healing 33hz Meditation Music
PINEAL GLAND Activation Frequency 936hz / Christ Consciousness Pyramid Healing 33hz Meditation Music
Published: 2017/02/08
Channel: LOKOS TV NOW MEDITATION MUSIC
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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
Anatomical terminology

A gland is an organ 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.

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.

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.

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.[1]

Other animals[edit]

Additional images[edit]

References[edit]

Public Domain This article incorporates text from a publication now in the public domainChisholm, Hugh, ed. (1911). "article name needed". Encyclopædia Britannica (11th ed.). Cambridge University Press. 

  1. ^ 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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