What is endocrine gland class 10

Exocrine Glands Definition Exocrine glands are cellular sub-structures, organs, in a body that provide a system to secrete substances out and external to the body. They are distinct from the other type of gland, endocrine, in that exocrine gland secretions end up external to the body, while endocrine secretions go into the bloodstream/internal. Exocrine glands secrete their substances through a ductal system. Function of Exocrine Glands Depending on the exocrine gland, they can function to regulate body temperature, lubricate, nurture newborns (lactation), aid in digestion, and aid in reproduction. Exocrine Gland Structure Exocrine gland structure is broken down into the ductal portion and the glandular portion. The glandular portion is either a round (also called acinus or acini (plural)) or elongated cluster of cells that produce the secreted substance. There are different types of cells found in the glandular portion depending on the substance secreted. Some common cell types include serous cells (protein excretion) and mucous cells (mucus/fluid excretion). The tubular portion is often a single, cuboidal cell thick wall that aids in movement of the secretion. The tubular duct can be simple in structure (unbranched) or complex with many duct branches. The tubular duct can also be observed in a simple coiled structure. Types of Exocrine Glands Exocrine glands are classified by the way secretion is accomplished in each organ: • Holocrine glands will release whole broken op...

What are Hormones? As stated above, hormones are chemicals that essentially function as messengers of the body. These chemicals are secreted by special glands known as the endocrine glands. These endocrine glands are distributed throughout the body. These messengers control many physiological functions as well as psychological health. They are also quite important in maintaining homeostasis in the body. Explore more: Cell Signaling The effects of hormones depend on how they are released. Hence, signalling effects can be classified into the following: • Autocrine: The hormone act on the cell that secreted it. • Paracrine: The hormone act on a nearby cell without having to enter the blood circulation. • Intracrine: The hormone is produced in the cell and acts intracellularly means inside the cell. • Endocrine: The hormone act on the target cells once it is released from the respective glands into the bloodstream. Types of Hormones To regulate various functions, different types of hormones are produced in the body. They are classified as follows: • Peptide Hormones • Steroid Hormones Peptide Hormones Peptide hormones are composed of amino acids and are soluble in water. Peptide hormones are unable to pass through the cell membrane as it contains a phospholipid bilayer that stops any fat-insoluble molecules from diffusing into the cell. Insulin is an important peptide hormone produced by the pancreas. Steroid Hormones Unlike peptide hormones, steroid hormones are fat-soluble a...