What is the difference between dog skin and human skin? Structure of "skin"
The top reason for consultation of dogs at animal hospital is "skin disease". To dogs, there are many skin troubles.
Why is the dog's skin weak? What causes skin trouble?
Let's learn the difference while comparing the characteristics of dog skin and human skin.
The skin of a dog is much thinner than a person.
The skin of a dog is made of three layers of the epidermis, the dermis, and the subcutaneous tissue from the outside like human beings. And the outermost side of the epidermis
It is a stratum corneum, playing a role of barrier to protect the body from damage from outside, irritation, drying, ultraviolet rays and so on.
People have thick, durable epidermis instead of being covered with coat.
However, the epidermis of a dog is only about 1/5 to 1/6 of a person's thickness. Therefore, it is vulnerable to irritation and drying, and it can be said that skin troubles are likely to occur.
The cause of the dog's odor is in the apocrine sweat gland.
In people and dogs, the sweat glands distributed on the skin also differ. There are two kinds of sweat glands, "eccrine sweat gland" and "apocrine sweat gland", and the perspiration which the person exercises after exercise,
Eccrine Sweat for body temperature control secreted from sweat glands. The eccrine sweat gland which is almost distributed throughout the body in humans, only in paws in dogs. For this reason, body temperature control is carried out mainly by panting (gasping called gasping breath) saliva evaporation.
On the other hand, "Apocrine sweat glands" which are found only in armpits, etc. are distributed throughout the body in dogs. Apocrine sweat gland secretes a bitter fat sweat. If this sweat is oxidized or decomposed into bacteria it will cause the odor specific to the dog.
Human skin turnover is 28th, what about dogs?
The skin is newly reborn with a constant cycle. Cells made with the basal layer at the bottom of the epidermis are gradually pushed up to the surface of the skin as the growth progresses and move to the stratum corneum at the outermost side of the epidermis, dandruff (horny) and It will fall and fall off. The process of creating new epidermal cells and falling off the surface of the skin is called turnover (metabolism).
Usually, skin turnover of a healthy person is 28 days cycle (cycle increases with age), but about 20 days for dogs. In dogs such as seborrhea, turnover may be extremely short, which is 5 to 10 days.
Why do dandruff and stickiness occur?
Dog's skin problems are often "dandruff" and "sticky skin". How does this happen?
Although dandruff is a stripped horny, if it is normal dandruff, it is a size that can not be seen with the naked eye. That is what makes visible dandruff because the turnover period of the epidermis is shortened. Short turnover will result in incomplete keratinization, so it will float off the skin surface and become visible as dandruff.
One is horny trouble. The stratum corneum covering the surface of the skin is composed of many layers of horny cells like bricks. And intercellular lipids (such as ceramides) fill the space between cells and cells, and they are tethered like an adhesive. If the turnover cycle becomes short and it becomes incomplete horny matter, this lipid leaks, causing stickiness.
Another is excessive secretion of fat and sweat. Fat and sweat are coming out of the pores.
It is secreted from the sebaceous gland and apocrine sweat gland directly connected to the hair follicle, but even if these secretions are excessive due to some cause, it will sticky to the skin.
Let's have the cause of the dandruff and the skin stick out properly and have the animal hospital teach the skin care by the shampoo suitable for the cause