gland
Definition
A gland is a group of cells that produce and secrete substances. There are many different types of glands in the body, and they produce a variety of substances.
Glands are classified into two main types: endocrine glands and exocrine glands. Endocrine glands secrete hormones, which are chemicals that travel through the bloodstream to target organs and tissues throughout the body. Exocrine glands secrete substances that are released onto the body's surface or into the body's cavities.
Some of the most important endocrine glands in the body include the pituitary gland, the thyroid gland, the parathyroid glands, the pancreas, the adrenal glands, and the gonads. These glands produce hormones that control a wide range of body functions, including growth, metabolism, reproduction, and stress response.
Some of the most important exocrine glands in the body include the sweat glands, the sebaceous glands, the salivary glands, the lacrimal glands, and the mammary glands. These glands secrete substances that help to protect the body, lubricate the skin, and produce milk.
Glands are essential for maintaining the body's health and well-being. They produce the hormones and other substances that keep the body's organs and tissues functioning properly.
How can the word be used?
The thyroid gland is a vital organ that regulates metabolism.
Different forms of the word
Noun: gland.
Adjective: glandular.
Verb: to gland.
Synonym: organ.
Etymology
The word "gland" comes from the Latin word "glandula", which means "acorn". The Latin word "glandula" comes from the Proto-Indo-European root "gl̥gʰ-", which means "to swell".
Question
What are glands?
AQA Science Exam Question and Answer
Question: What are the different types of glands in the human body?
Answer:
There are two main types of glands in the human body: exocrine glands and endocrine glands.
- Exocrine glands secrete their products through ducts to the outside of the body or to other organs. Examples of exocrine glands include sweat glands, salivary glands, and tear glands.
- Endocrine glands secrete their products directly into the bloodstream. Examples of endocrine glands include the thyroid gland, the pituitary gland, and the pancreas.