The integumentary system consists of the skin, hair, nails, and glands. The word INTEGUMENT comes from a Latin word that means “covering”. The skin is the largest organ of the body that is waterproof and airtight so that water and other things keep out. With the skin being waterproof it helps the body to stay dry and prevents the body from losing its fluids and drying out. The skin protects the body from many infectious organisms and harmful effects of ultraviolet radiation. The skin also helps control the body’s temperature and has its unique way of converting ultraviolet light into vitamin D which is very important for building strong bones and teeth. The skin is one of the first defense mechanisms in your immune system. The skin has a way to go through thermoregulation which secretes sweat to cool down the body when the body’s temperature begins to rise during exercise; it also removes toxins through sweat. The skin is a protective covering that consists of 3 layers the epidermis, dermis which is the 2 major regions that are considered the real integument. The hypodermis is the third layer and is not considered a layer of the integument and is highly vascularized. The epidermis is made up of stratified squamous epithelium tissue that is capable of keratinizing. The epidermis alone is composed of five strata layers, from the most superficial layer to the deep layer are stratum corneum the most outer layer which has up to 30 layers of dead cells that has no nuclei or organelles and sheds constantly. This layer is completely keratinized. The next layer is the stratum lucidum which is a very thin layer and is full of keratin and oil substances but is seen only in thick skin. Then comes stratum granulosum, it is three to five layers of flat keratinocytes the cells contain a lipid rich substance that helps to waterproof the skin, prevents the skin from dehydrating and cuts off surface strata from nutrient supply. The stratum spinosum has several layers of keratinocytes and the deepest spinosum layer can undergo mitosis which helps push more keratin toward the surface. The stratum basale is the deepest cell layer of the epidermis. It is a single layer of cuboidal cells attached to the basement membrane. These cells undergo rapid cell division, which are keratinocytes and melanocytes. The keratinocytes produce keratin to protect against wear and tear. Melanocytes produce melanin that is phagocytosed by keratinocytes and forms a protective cap over the nuclei from UV rays. The melanin protects the nuclei from DNA damage. These cells together allow skin pigmentation, protection from UV and are found only in the epidermis. The next major region is the dermis which is separated from the superficial epidermis by a wavy boundary that offers structural integrity. The layers of the dermis are the papillary layer that’s made of areolar tissue and then the reticular layer which consists of dense irregular tissue is the deepest part of the dermis. The dermis contains proteins collagen, elastic, and reticular fibers. The mast cells found in the dermis are responsible for releasing two chemicals heparin and histamine. Heparin is a natural blood thinner and histamine causes vasodilation. The dermis has blood vessels, nerves, sensory receptors, hair follicles and different types of glands such as sweat glands, sebaceous glands, and apocrine glands. The nails are protective covers on the ends of fingers and toes. The main function of the integumentary system is to provide a protective covering for the body. The skin protects the body from many infectious…
DHO 6:3 pg 113-117
Wkbk pg 40-41
Integumentary system includes:
Skin (dermis, epidermis, subcutaneous
fascia or hypodermis)
Glands (sweat and oil glands)
Epidermis – outermost layer; made of five
small layers; no blood vessels or nerve cells
Dermis – middle layer, framework of elastic
connective tissue and contains blood vessels,
lymph vessels, nerves, involuntary muscle,
sweat and oil glands…
The Integumentary System
The Three Main Layers of Skin:
1. Epidermis: The first layer of skin is called the Epidermis. It is composed of stratified squamous epithelium that is keratinized. It contains the keratinocytes and melanocytes, it is avascular, and is the tissue layer above skin. It is the BARRIER Layer. The Epidermis is made up of five different layers:
Stratum Corneum: known as the “horny” layer, dead, stratified squamous, and it looks rough. This layer can become thick (callus) from…
The Integumentary System
By: Sasha Caldwell
The Integumentary System has multiple important roles in maintaining
life. It includes protection, temperature regulation, sensory reception, biochemical synthesis, and absorption. All body systems work in an interconnected manner to maintain the internal conditions essential to the function of the human body. The Integumentary System contains the largest organ in the human body, the skin. The skin cushions and protects the delicate organs beneath…
Effects of System Dysfunction
The integumentary system is very important in an individuals overall health. Lets say the the system began to function incorrectly or did not function at all. Here are some possible outcomes from this scenario.
Sweat is a part of homeostasis and if the skin didn't exist, then the body can not excrete sweat. Therefore, you could not use this as a way to cool off.
Without the skin, hair, and nails, pathogens could enter your body with ease. This would certainly…
Functions of the
• Structures that are part of
• Overview of Functions
Vitamin D production
• Epidermis: Superficial layer of epithelial tissue.
• Dermis: Deep layer of connective tissue.
– Structural strength
• Subcutaneous tissue
– Not part of skin
– Loose connective tissue that connects skin to underlying…
The integumentary system is a very vital piece of an intricate puzzle commonly known as the human body. It may seem like a very small piece, but it does so much. It helps protect tissues and organs, regulate body temperature, synthesize and store energy, detect certain senses, and excrete wastes. Within itself, this system has a multitude of components including multiple layers of skin, hair follicles, nails, and various glands. Individually, and as a whole unit, these components serve a highly…
in the skin release waste in the sweat)
Integumentary System Organs
The integumentary system forms a protective barrier between the external environment and the inner tissues. Other than that, the integumentary system organs work together to provide insulation and help in excreting waste from the body. To know more about the same, read on...
Skin which is the largest organ of the body is also the principal organ of the integumentary system. Other than the skin, nails, hair, scales and…
Lab 3: The Integumentary System
Part A: Structures of the Integumentary System
Identify the structures that comprise the integumentary system:
3. Skin Glands
List the functions of the skin:
1. Protection, barrier against outside
2. Protection against dehydration
3. Body Temperature Regulation
5. Metabolic functions
6. Blood reservoir
Compare and contrast keratinocytes and melanocytes using the Venn diagram below:…
1. The Skeletal System
The skeletal system is the bones in our body and the tissues such as the tendons, ligaments, and cartilage that connect them. The role of our skeletal system is to support our body. Without the support of the skeletal system our body would be like a puddle of skin and guts in the floor. Not only does it support our body but it protects our internal organs and other fragile tissues. It protects the brain, eyes, heart, lungs and spinal cord. Our brain is protected by the…
Everything you need to know
Written by Asher Brinton
what is a body system?
A body system is a group of organs or structures that together perform one or more vital functions. An example of this is the Endocrine system. The endocrine system works together to induce sleep and growth along with other things.
Can you list the body systems?
1. The nervous system yes
2. The reproductive system yes
3. The immune system
4. The excretory/urinary system yes
5. The circulatory system…