Futtermittel

Louven ist ein Großhandelsunternehmen für Tiernahrung und Zubehör mit Standort in Mönchengladbach Nordrhein-Westfalen

Eintrag vom: 16.04.2013.

It explains the anatomy and function of dermal microcirculation capillary loops and lymphatic vessels highlighting their roles in temperature regulation and fluid resorption.

 

Abstract The level of skin blood flow is subject to both reflex thermoregulatory control and influences from the direct effects of warming and cooling the skin. The effects of local changes in temperature are capable of maximally vasoconstricting or vasodilating the skin.

 

During exposure to cold our bodies strive to maintain normal core temperature by restricting heat loss which is mediated by reducing blood flow to the skin (cutaneous vasoconstriction) and by increasing heat production (shivering and non-shivering thermogenesis).

 

Vasodilation and increased skin blood flow (in concert with sweating) are essential to heat dissipation during heat exposure and exercise. During cold exposure vasoconstriction in the skin decreases heat loss from the body and protects against hypothermia.

 

Blood vessels in the skin are arranged in two layers or plexuses [1]. The top of the dermal layer is largely loops (AV shunts) that are used to establish a thermal heat gradient to the upper skin for heat loss in the process of thermoregulation. There are some nutritive vessels in this layer.

 

Blood flow to the skin provides nutrition to skin and regulates body heat through the constriction and dilation of blood vessels. The small blood vessels in the skin contain muscles in their tunica media under the control of the sympathetic nervous system.

 

Skin blood vessels are defined as the vascular structures in the skin that regulate body temperature by constricting to conserve heat and dilating to release heat with their function being influenced by the sympathetic nervous system and local vasodilator metabolites.

 

Skin blood flow is the major controller of temperature regulation. Apical skin areas such as hands feet ears and nose have vasomotor control only by noradrenergic vasoconstrictor nerves. These nerves respond to increased release of norepinephrine.