Which term is commonly known as itching?

Itch (also known as pruritus) is a sensation that causes the desire or reflex to scratch.

Which chemical causes the signs of an allergic response when it is released in response to allergens quizlet?

As a result, a chemical called histamine is released and causes symptoms of allergies.

Which procedure is the replacement of damaged skin with healthy tissue taken from a donor site on the patient’s body?

A skin graft is a surgical procedure in which a piece of skin is transplanted from one area to another. Often skin will be taken from unaffected areas on the injured person and used to cover a defect, often a burn.

What is the tissue layer directly below the epidermis?

The subcutaneous tissue (from Latin subcutaneous ‘beneath the skin’), also called the hypodermis, hypoderm (from Greek ‘beneath the skin’), subcutis, superficial fascia, is the lowermost layer of the integumentary system in vertebrates.

Which chemical causes the signs of an allergic response when it is released?

When you’re exposed to the allergen again, these antibodies can release a number of immune system chemicals, such as histamine, that cause allergy symptoms.

What is a substance that provokes an allergic response?

Antigens that provoke an allergic reaction are called allergens. Typical allergens include pollens, drugs, lints, bacteria, foods, and dyes or chemicals.

What is the white layer of skin called?

Dermal white adipose tissue is a unique layer of adipocytes within the reticular dermis of the skin. Recently, several nonmetabolic activities have been discovered for dWAT and its fibroblast precursors. These functions include antimicrobial defense and roles in hair cycling, wound healing, and thermogenesis.

What protein waterproofs the skin?

– 1 – the keratinocytes:

compose most of the epidermis. They produce a protein: the keratin that helps waterproof the skin and that protects the skin and the underlying tissues from heat, microbes, abrasion and chemicals.

What is the name of the second layer of the skin?

dermis
The second layer of the skin (located under the epidermis) is called the dermis; it contains collagen and elastin, blood vessels, lymph vessels, nerve endings, sweat glands, sebaceous (oil) glands, and hair follicles.

What is the largest organ in the body?

The skin
The skin is the largest organ of the body. The skin and its derivatives (hair, nails, sweat and oil glands) make up the integumentary system. One of the main functions of the skin is protection. It protects the body from external factors such as bacteria, chemicals, and temperature.

Are there 7 layers of skin?

The skin is the body’s largest organ and it is made up of seven layers, each of which has a specific function. … The skin also helps maintain body temperature and prevent water loss from the body. The first five layers of the skin are part of the epidermis, and next two layers comprise the dermis.

Where is the skin thinnest?

eyelids
Skin is thickest on the palms and soles of the feet (1.5 mm thick), while the thinnest skin is found on the eyelids and in the postauricular region (0.05 mm thick). Male skin is characteristically thicker than female skin in all anatomic locations.

What is the smallest organ?

the pineal gland
The smallest organ in the body is the pineal gland, relative to its function. It is situated centrally in the brain, between the hemispheres in a groove. Size is about 8mm in humans. This smallest gland is so as it has a pinecone shape.

What is our skin made of?

Skin has three layers: The epidermis, the outermost layer of skin, provides a waterproof barrier and creates our skin tone. The dermis, beneath the epidermis, contains tough connective tissue, hair follicles, and sweat glands. The deeper subcutaneous tissue (hypodermis) is made of fat and connective tissue.

What body part stays the same from birth to death?

but eyes are the only special sense organ which will have the same size from birth until we die.

What is the weakest bone in human body?

Clavicle
Clavicle: Clavicle, or collar bone, is the body’s softest and weakest bone. It is easy to break since it is a thin bone that runs horizontally between your breastbone and shoulder blade.

Where is the largest bone in your body?

thigh
The femur bone is the longest and strongest bone in the body. Located in the thigh, it spans the hip and knee joints and helps maintain upright posture by supporting the skeleton. 2. The humerus bone is in the upper arm and spans the shoulder and elbow joints.

How much blood is in the human body?

The average adult has around 10 pints of blood (roughly 8% of your body weight).