IgA - Immunoglobin A
There are two immunoglobulins in exocrine secretions: lgA & lgE
The sebaceous glands and sweat glands secretes their secretions on the surface. That is on the skin. Technically the glands of the intestine also secrete their secretions on the surface. The intestinal cavity is never 'inside' your body. It is out side your body.
Exocrine gland are the glands that secrete their products through the ducts, and discharges it into the external environment, to organs or the outside the body. Where as Endocrine gland have ducts that deliver the products in the superficial part of the body, such as the skin, or in the inner part where they are necessary such as the pancreatic juice that is carried into the intestine to aid digestion.
The most common type of exocrine glands are the sweat glands. These glands are found throughout the body and are responsible for producing and secreting sweat to help regulate body temperature.
The unicellular exocrine glands found in the intestinal mucosa are called goblet cells. They secrete mucus to protect and lubricate the lining of the intestines.
Immunoglobulin A (IgA) is the primary antibody found in blood and respiratory secretions. It plays a crucial role in mucosal immunity, providing a first line of defense against pathogens in mucosal areas such as the respiratory tract. IgA exists in two forms: serum IgA, found in the bloodstream, and secretory IgA, which is present in mucosal secretions like saliva, tears, and respiratory fluids.
In a single person there are seven major endocrine glands: Pineal gland (brain), pituitary gland (brain), pancreas (abdomen), thyroid gland (throat), thymus (chest), adrenal gland (abdomen), ovary in females (abdomen), and testis in males (groin). The exocrine glands are sweat glands, mammary glands, salivary glands, and the liver.
These two glands are found in the skin and are known as exocrine glands because they have a duct through which the substance travels.If they do not have a duct and secrete a substance directly into the blood they are called endocrine glands.
The tiny tubes that carry the secretions of glands to the areas that need them are called ducts. These ducts can be found in various parts of the body, such as the digestive system, respiratory system, and reproductive system.
The gland found in the underarm or groin is called the apocrine gland. These glands produce a thicker secretion compared to eccrine glands, and their secretions can mix with bacteria on the skin to produce body odor.
Merocrine glands are a type of exocrine glands that secrete their products by exocytosis without losing any part of their cytoplasm. They are found in various tissues such as salivary glands, sweat glands, and pancreas. Their secretion is released via ducts to the surface of the skin or into body cavities.
Epithelial tissues are responsible for producing glands in the body. Glands are specialized structures that can secrete substances such as hormones, enzymes, and sweat to perform specific functions in the body. These glands can be found in various parts of the body, including the skin, digestive system, and endocrine system.