holocrine gland

Examples of holocrine gland in the following topics:

• Sebaceous (Oil) Glands

  • Sebaceous glands are found in the skin all over the body (except the palms of the hands and the soles of the feet).
  • The sebaceous glands are microscopic glands found in the skin of mammals .
  • In the eyelids, meibomian sebaceous glands secrete a special type of sebum into tears.
  • In the glands, sebum is produced within specialized cells and is released as these cells burst; sebaceous glands are thus classified as holocrine glands.
  • In the glands, sebum is produced within specialized cells and is released as these cells burst; sebaceous glands are thus classified as holocrine glands.

• Overview of the Adrenal Glands

  • In mammals, the adrenal glands (also known as suprarenal glands) are endocrine glands that sit atop the kidneys.
  • In mammals, the adrenal glands (also known as suprarenal glands) are endocrine glands that sit atop the kidneys.
  • In humans, the right adrenal gland is triangular shaped, while the left adrenal gland is semilunar shaped.
  • Each adrenal gland has two distinct structures, the outer adrenal cortex and the inner medulla, both of which produce hormones.
  • The adrenal glands are triangular-shaped organs on top of the kidneys.

• Sweat (Sudoriferous) Glands

  • Sweat glands, also known as sudoriferous glands, are distributed over most of the body surface.
  • Sweat glands, also called sudoriferous glands, are simple tubular glands found almost everywhere on our body. 
  • The other kind of sweat glands are known as apocrine glands. 
  • Unlike eccrine glands, the exact function of apocrine glands is unknown and debated. 
  • Cross sectional image of skin showing a sweat gland and a sebaceous gland.

• Overview of the Parathyroid Glands

  • The parathyroid glands are small endocrine glands in the neck that produce parathyroid hormone.
  • The parathyroid glands are small, approximately the size of a grain of rice, endocrine glands in the neck that produce parathyroid hormone.
  • Humans usually have four parathyroid glands, which are usually located on the posterior surface of the thyroid gland, or, in rare cases, within the thyroid gland itself or in the chest.
  • The two parathyroid glands on each side which are positioned higher are called the superior parathyroid glands, while the lower two are called the inferior parathyroid glands.
  • The parathyroid gland in relation to the thyroid gland.

• Gland Disorders

• Glandular Epithelia

  • There are two major classifications of glands: endocrine glands and exocrine glands.
  • Examples of exocrine glands include the sweat glands, salivary glands, mammary glands, the pancreas, and the liver.
  • An endocrine gland is its counterpart.
  • Examples of endocrine glands include the adrenal glands, located atop the kidneys and responsible for the secretion of certain hormones such as adrenaline, cortisol, and others.
  • The sebaceous glands are microscopic glands in the skin that secrete an oily/waxy matter, called sebum, to lubricate and waterproof the skin and hair of mammals.

• Excretion and Absorption

  • ., perspiration via the eccrine glands).
  • Two types of sweat glands can be found in humans: eccrine glands and apocrine glands.
  • Eccrine glands are the major sweat glands of the human body, found in virtually all skin .
  • The sebaceous glands are microscopic glands in the skin that secrete an oily/waxy matter, called sebum, to lubricate and waterproof the skin and hair of mammals.
  • A sectional view of the skin (magnified), with the eccrine glands highlighted.

• Overview of the Pituitary Gland

  • The pituitary gland is connected to the hypothalamus and secretes nine hormones that regulate body homeostasis.
  • The pituitary gland, or hypophysis, is an endocrine gland about the size of a pea.
  • The pituitary gland secretes hormones that regulate homoeostasis.
  • The pituitary gland is divided into two parts, the anterior pituitary and the posterior pituitary .
  • In this image, the pituitary gland is referred to by its other name, the hypophysis.

• Overview of the Endocrine System

  • The endocrine system is a system of ductless glands that secrete hormones, which are chemical messengers that act at a distance.
  • For example the pineal gland, located at the base of the brain, secretes the hormone melatonin, responsible for regulating sleep patterns.
  • The endocrine system is in contrast to the exocrine system which features ducted glands which secrete substances onto an epithelial surface for example a sweat gland.
  • The major endocrine glands include the pituitary, pineal, ovaries, testes, thyroid, hypothalamus and adrenal glands, additionally other tissues such as the kidney and liver also display secondary adrenal functions.
  • The endocrine systems found in the head and neck include the hypothalamus, pineal, pituitary and thyroid glands.

• Control of the Pituitary Gland by the Hypothalamus

  • The pituitary gland consists of the anterior pituitary and the posterior pituitary.
  • The pituitary gland consists of two components: the anterior pituitary and the posterior pituitary, and is functionally linked to the hypothalamus by the pituitary stalk (also named the "infundibular stem", or simply the "infundibulum").
  • Whilst the pituitary gland is known as the 'master' endocrine gland, both of the lobes are under the control of the hypothalamus; the anterior pituitary receives its signals from the parvocellular neurons and the posterior pituitary receives its signals from magnocellular neurons.