According to the Encyclopaedia Britannica, sweat glands regulate body temperature by secreting water onto the surface of the skin where heat is then removed by evaporation. There are two types of sweat glands found only in mammals, the eccrine sweat glands and the apocrine sweat glands. The eccrine sweat glands are controlled by the sympathetic nervous system and are responsible for regulating body temperature.Know More
When internal temperatures rise, the eccrine sweat glands secrete water onto the surface of the skin. Heat is then able to evaporate, allowing the body temperature to regulate. The Encyclopaedia Britannica states that animals such as humans, horses, and bears have active eccrine glands over most of their body which act as a major source for regulating their body temperature. In other animals, such as dogs and cats, the eccrine glands are only present in the paw pads or lip margins and may not be present anywhere else on the body. These animals mainly rely on panting to regulate their body temperature. Smaller animals, such as rodents, do not posses eccrine glands because they cannot endure dehydration.
Apocrine sweat glands are associated with hair follicles and continuously secrete fatty sweat into gland tubules. According to the Encyclopaedia Britannica, emotional stress causes the tubules to expand, expelling the fatty secretion onto the skin where local bacteria then break it down into odorous fatty acids. The apocrine sweat glands are located in the underarms and genital areas of human beings.Learn more about Glands & Hormones
Humans have a fairly rare ability to sweat, which allows them to excrete a salty liquid in order to cool the skin. This is essential to sustain endurance activities without overheating.Full Answer >
According to MedlinePlus, the glands in the back of the head are referred to as lymph nodes and are responsible for aiding the body in fighting illnesses and infections. Lymph nodes are also present behind both ears and run down each side of the neck.Full Answer >
Sweat uses evaporative cooling to maintain body temperature. As liquids evaporate, they shed molecules into the air. The liquid changes into a gas, drawing heat from the liquid. The process draws heat from the body. Evaporation also cools the remaining liquid because faster-moving hot molecules are more likely to escape into the air, according to HowStuffworks.Full Answer >
According to Central Virginia Community College, endocrine glands secrete hormones into their internal environment and lack ducts. By contrast, exocrine glands secrete substances, such as wax, saliva and enzymes, into their external environment via ducts. The University of Leeds explains that both types of glands are comprised of secretory epithelial cells. During the course of development, some exocrine glands lose their ducts and become endocrine glands.Full Answer >