You sweat much stronger in the palms of your hand and the soles of your feet, because they contain a much higher density of eccrine sweat glands. According to Sato et al., (see reference 1) there are something like 64 glands per cm² on your back, 108/cm² on your forearm and 600-700/cm² on the palms of your hands.
What happens to the skin when exposed to UV radiation?
What are the two major components of the integumentary system?
Which cells produce pigment melanin?
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Which skin area tested has the most sweat glands?
palms and soles ofThe region with greatest sweat gland density is the palms and soles of the feet, which contain 600–700 sweat glands/cm2 [195]. The primary function of sweat glands is to keep the core body temperature at approximately 37 °C by releasing sweat in a hot environment or during physical activity [189,195].
Which other body areas would prove to have a high density of sweat glands?
Eccrine sweat glands Gland density is not uniform across the body surface area. The highest gland densities are on the palms and soles (~250–550 glands/cm2) [16] and respond to emotional as well as thermal stimuli.
Which part of the skin collects sweat?
Eccrine sweat glands occur over most of the body and open directly onto the skin's surface. Apocrine glands open into the hair follicle, leading to the surface of the skin. Apocrine glands develop in areas with many hair follicles, such as on the scalp, armpits and groin.
What are the most numerous glands in the palms of our hands and the soles of our feet?
Sudoriferous (soo door RĬF or us) glands are sweat glands. About 2 million are distributed over the surface of the body, more numerous on the palms of the hands, soles of the feet, forehead, and axillae (AG zil ah) or underarms. Sweat glands produce sweat or perspiration.
What parts of the body have the most sweat glands quizlet?
Keeps hair and skin soft and pliable, inhibits growth of bacteria on the skin, and helps prevent water loss. What parts of the body have the most sweat glands? Palms and soles.
What area of your body had the greatest density of sweat glands what area had the lowest Why do you think that is?
A recent study showed the highest sweat gland density can be found on the palms and soles and the least on the back. The palms have been shown to have up to 700 glands per square centimeter.
Do palms have sweat glands?
The palms of your hands and the soles of your feet have more sweat glands than any other part of your body. Some people have hands and feet that sweat a lot. This problem is common and can be very embarrassing.
What part is played by sweat glands during the process of sweating?
Sweat glands are used to regulate temperature and remove waste by secreting water, sodium salts, and nitrogenous waste (such as urea) onto the skin surface. The main electrolytes of sweat are sodium and chloride, though the amount is small enough to make sweat hypotonic at the skin surface.
Where are apocrine sweat glands most abundant?
Apocrine sweat glands start to function at puberty under the stimulation of sex hormones. They are associated with hair follicles in the groin and axillary region. The viscous, protein-rich product is initially odorless but may develop an odor after exposure to bacteria.
Why does the Palm have more sweat glands?
Knowing this, we can hypothesize that the palms have more sweat glands than the forearm because sweat glands are controlled by hormones rather than nerves, and the palms and soles of feet provide a larger surface area for sweat to be evaporated and cool down the skin.
What kind of skin is on the palms of your hands?
The thickness of each layer of the skin varies depending on body region and categorized based on the thickness of the epidermal and dermal layers. Hairless skin found in the palms of the hands and soles of the feet is thickest because the epidermis contains an extra layer, the stratum lucidum.
How does the skin of your palm differ from that on the back of your hand?
How does the skin of your palm differ from that on the back of your hand? The skin on your palm is thick skin. Think skin has an extra layer of skin for protection and does not grow hair as where the back of your hand is thin skin, grows hair, and the nerve endings are closer to the surface making it more sensitive.
Why do humans born without sweat glands not survive?
Without being able to sweat, they are at high risk for heat-related illnesses such as heat exhaustion and heat stroke. In extreme cases, or if these heat-related illnesses are not treated appropriately, coma or death can result.
Why do humans born without sweat glands not survive why not?
Why do humans born without sweat glands usually not survive? Sweat glands create openings in the skin where gas exchange occurs. Sweating is an important mechanism for maintaining the correct body temperature. Sweating is the only way the body eliminates excess water.
Why would a person born with an absence of sweat glands be very susceptible to death by overexposure to heat?
Hypohidrosis (also referred to as anhidrosis) is a condition in which patients have deficient or absent sweating. On heat stress, body temperature in these patients can increase to dangerous levels leading to hyperthermia, heat exhaustion, heat stroke, and potentially death (Sato et al.
What is the purpose of sweat glands?
Sweat glands occur all over the body, but are most numerous on the forehead, the armpits, the palms and the soles of the feet. Sweat is mainly water, but it also contains some salts. Its main function is to control body temperature. As the water in the sweat evaporates, the surface of the skin cools.
Classification of Tissues Flashcards | Quizlet
Study with Quizlet and memorize flashcards containing terms like List the following in order form least complex to most complex: organ, cell, tissue, and organ system., Define histology., Use key choices to identify major tissue types described below. Key: a. connective tissue b. epithelium c. muscle d. nervous tissue 1. lines body cavities and covers the body's external surface. 2. pumps ...
The Skin (Integumentary System) Flashcards | Quizlet
Study with Quizlet and memorize flashcards containing terms like The two basic tissues of which the skin is composed are dense connective tissue, which makes up the dermis, and ____, which forms the epidermis. Most cells of the epidermis are _____. The protein ____ makes the dermis tough and leatherlike. The specialized cells that produce the pigments that contribute to skin color are called ...
Using the key choices choose all responses that apply to the following ...
Answer and Explanation: b. stratum corneum: 5. layer including scalelike dead cells, full of keratin, that constantly slough off. The most superficial epidermal layer conformed of squamous, plane, thin cells with keratin in their cytoplasm, that are continuously released.
What happens to the skin when exposed to UV radiation?
When exposed to UV radiation, the melanocytes produce more protective melanin and the skin becomes more brown in color. L
What are the two major components of the integumentary system?
The integumentary system, which has numerous functions, has two major components: 1. cutaneous membrane (skin) 2. the accessory structures (hair, nails, and several types of exocrine glands). Cutenous membrane is compose of 2 tissues ___1___ and __2___ these membranes are comprise of __3__.
Which cells produce pigment melanin?
1. stratum basale ( germinativum) one layer of cells thick. basement membrane; basal steam cells - keratinocytes; melanocytes- produce the pigment melanin. Merkel cells (sensation of touch) -all these cells are found in stratum basale-
What is the function of sweat glands in mammals?
In mammals, sweating is a multifunctional response that aids in locomotion, thermal regulation, self-protection, and communication of psychological state. Humans possess three types of sweat glands (apocrine, eccrine, and apoeccrine) that are differentially distributed on the body surface and make u …
What is the purpose of sweating?
In mammals, sweating is a multifunctional response that aids in locomotion, thermal regulation, self-protection, and communication of psychological state . Humans possess three types of sweat glands (apocrine, eccrine, and apoeccrine) that are differentially distributed on the body surface and make unique contributions to these distinct functions of the sweating response. In humans, eccrine glands, which are widely distributed on hairy skin, play an important role in thermoregulation. They are also found on the glabrous skin of the palm and sole, where they are not usually activated by heat, but rather by deep respiration, mental stress, and local tactile stimulation. Sweating on the palm and sole, so-called "emotional sweating", acts to prevent slippage while grasping or performing a delicate task using the fingertips. Although the central pathways of emotional sweating are not yet elucidated in detail, it is thought that the amygdala, cingulate cortex, and medulla participate via efferent fibers that descend through the spinal cord and connect to preganglionic sympathetic neurons in the nucleus intermediolateralis. The limbic system, including the amygdala and cingulate cortex, is critical for emotional processing and many cognitive functions. Thus, measurement of sweat output on the palm or sole is useful for evaluating sympathetic function and limbic activity in autonomic and psychiatric disorders.
What is the difference between bromhidrosis and hyperhydrosis?
Treatment options include topical medications, oral medications, surgical procedures, or botulinum toxin injection. Bromhidrosis is a similar disorder that presents with excessive malodorous perspiration. It can involve either apocrine or eccrine sweat glands; apocrine bromhidrosis tends to develop after puberty, while eccrine bromhidrosis may develop at any age. It is caused by excessive perspiration that secondarily becomes malodorous by the bacterial breakdown. Because poor hygiene most often aggravates bromhidrosis, an effective treatment strategy includes improving personal hygiene. Surgical approaches, antibacterial agents, and antiperspirants are treatment options as well. [12][13][14]
What is the mechanism of sweating?
Eccrine sweat glands receive sympathetic innervation via cholinergic fibers that send impulses in response to changes in core body temperature. The thermoregulatory center of the hypothalamus mediates sympathetic innervation to the sweat glands. A short preganglionic cholinergic fiber originates from the thoracolumbar region of the spinal cord synapses with the postganglionic neuron via nicotinic acetylcholine. The postganglionic fiber releases acetylcholine, which differs from all other sympathetic postganglionic fibers that release norepinephrine. Cholinergic stimulation of muscarinic receptors induces sweating. Apocrine sweat glands receive adrenergic sympathetic innervation. Because apocrine sweat glands respond to norepinephrine, they are involved in emotional sweating due to stress, fear, pain, and sexual stimulation.
How does sweat glands work?
Eccrine sweat glands serve a thermoregulatory function via evaporative heat loss. When the internal temperature of the body rises, sweat glands release water to the skin surface. There, it quickly evaporates, subsequently cooling the skin and blood beneath.; this is the most effective means of thermoregulation in humans. Eccrine sweat glands also participate in ion and nitrogenous waste excretion. In response to emotional or thermal stimuli, sweat glands can produce at least 500 mL to 750 mL in a day. [4][5][6]
What is the blood supply to sweat glands?
Sweat glands, along with all other skin appendages, receive blood supply from cutaneous perforators of underlying source vessels . The perforators may branch directly from the source as septocutaneous or fasciocutaneous perforators or from muscular branches as musculocutaneous perforators. Once these perforators reach the skin, they form extensive networks called dermal and subdermal plexuses. Interconnections between these plexuses form via connecting vessels that run perpendicular to the skin surface, creating a continuous vascular plexus in the skin.
What are the thin spindle-shaped cells that show features of both epithelium and smooth muscle?
Myoepithelial cells are thin, spindle-shaped cells that show features of both epithelium and smooth muscle. These cells are found in the outer layer of eccrine sweat glands and contract to help expel sweat from the glands. [8]
What is the condition that affects the sweat glands?
Another autosomal recessive congenital disorder that affects sweat glands is lamellar ichthyosis. Infants with this condition present with persistent scaling skin and impaired growth of hair are possible. Impairment of sweat gland development often causes infants to suffer in severely hot weather as they cannot maintain thermoregulation through sweating. General defectiveness of the skin barrier function can also lead to dehydration and increased susceptibility to infections. [16]
Where do sweat glands originate?
Both eccrine and apocrine sweat glands originate from the epidermis. Eccrine glands begin as epithelial cellular buds that grow into the underlying mesenchyme. The glandular secretory components then form by elongation of the gland and coiling of the ends. Epithelial attachments of the developing gland create primordial sweat ducts. Finally, the central cells degenerate to form the lumen of the sweat duct. Cells on the periphery of the gland differentiate into secretory and myoepithelial cells. Eccrine sweat glands first appear on the palms and soles during the fourth month of gestation; they become functional soon after birth.
What happens to the skin when exposed to UV radiation?
When exposed to UV radiation, the melanocytes produce more protective melanin and the skin becomes more brown in color. L
What are the two major components of the integumentary system?
The integumentary system, which has numerous functions, has two major components: 1. cutaneous membrane (skin) 2. the accessory structures (hair, nails, and several types of exocrine glands). Cutenous membrane is compose of 2 tissues ___1___ and __2___ these membranes are comprise of __3__.
Which cells produce pigment melanin?
1. stratum basale ( germinativum) one layer of cells thick. basement membrane; basal steam cells - keratinocytes; melanocytes- produce the pigment melanin. Merkel cells (sensation of touch) -all these cells are found in stratum basale-