Blood supply of the skin

Blood supply of the skin

The body can be envisaged as three-dimensional segments of tissue called angiosomes, each with an arterial supply and a venous drainage. Blood equilibrates and flows between neighbouring angiosomes via ‘choke’ vessels, which tend to be situated within muscles. Cutaneous arteries, direct branches of segmental arteries (concentrated at the dorsoventral axes and intermuscular septae), perforate the underlying muscles or run directly within fascial layers to the skin from the deep tissues ( Figure 45.2 ). The blood supply to the skin anastomoses in subfascial, fas - cial, subdermal, dermal and subepidermal plexi. The epider - - mis contains no blood vessels so cells there derive nourishment by di ff usion.

Sweat gland Subcutaneous fat Angiosome A Angiosome B Epidermis Subcutaneous fat Musculocutaneous perforator Fasciocutaneous perforator Muscle Fascia and epimysium Choke vessels between angiosomes A and B within muscle Named artery and Major vein vein Major artery Figure 45.2 Schematic showing two neighbouring angiosomes. Note the choke vessels within the muscle spanning the two cutaneous territories of angiosomes A and B; two common examples of myocu

taneous /f_l aps that utilise this physiology include the rectus abdominis and the latissimus dorsi /f_l aps.

unvalved veins. Unvalved veins allow oscillating flow in the subdermal plexus between cutaneous territories, equilibrating flow and pressure. The valved cutaneous veins drain via plexi to the deep veins. Blood supply of the skin

The body can be envisaged as three-dimensional segments of tissue called angiosomes, each with an arterial supply and a venous drainage. Blood equilibrates and flows between neighbouring angiosomes via ‘choke’ vessels, which tend to be situated within muscles. Cutaneous arteries, direct branches of segmental arteries (concentrated at the dorsoventral axes and intermuscular septae), perforate the underlying muscles or run directly within fascial layers to the skin from the deep tissues ( Figure 45.2 ). The blood supply to the skin anastomoses in subfascial, fas - cial, subdermal, dermal and subepidermal plexi. The epider - - mis contains no blood vessels so cells there derive nourishment by di ff usion.

Sweat gland Subcutaneous fat Angiosome A Angiosome B Epidermis Subcutaneous fat Musculocutaneous perforator Fasciocutaneous perforator Muscle Fascia and epimysium Choke vessels between angiosomes A and B within muscle Named artery and Major vein vein Major artery Figure 45.2 Schematic showing two neighbouring angiosomes. Note the choke vessels within the muscle spanning the two cutaneous territories of angiosomes A and B; two common examples of myocu

taneous /f_l aps that utilise this physiology include the rectus abdominis and the latissimus dorsi /f_l aps.

unvalved veins. Unvalved veins allow oscillating flow in the subdermal plexus between cutaneous territories, equilibrating flow and pressure. The valved cutaneous veins drain via plexi to the deep veins. Blood supply of the skin

The body can be envisaged as three-dimensional segments of tissue called angiosomes, each with an arterial supply and a venous drainage. Blood equilibrates and flows between neighbouring angiosomes via ‘choke’ vessels, which tend to be situated within muscles. Cutaneous arteries, direct branches of segmental arteries (concentrated at the dorsoventral axes and intermuscular septae), perforate the underlying muscles or run directly within fascial layers to the skin from the deep tissues ( Figure 45.2 ). The blood supply to the skin anastomoses in subfascial, fas - cial, subdermal, dermal and subepidermal plexi. The epider - - mis contains no blood vessels so cells there derive nourishment by di ff usion.

Sweat gland Subcutaneous fat Angiosome A Angiosome B Epidermis Subcutaneous fat Musculocutaneous perforator Fasciocutaneous perforator Muscle Fascia and epimysium Choke vessels between angiosomes A and B within muscle Named artery and Major vein vein Major artery Figure 45.2 Schematic showing two neighbouring angiosomes. Note the choke vessels within the muscle spanning the two cutaneous territories of angiosomes A and B; two common examples of myocu

taneous /f_l aps that utilise this physiology include the rectus abdominis and the latissimus dorsi /f_l aps.

unvalved veins. Unvalved veins allow oscillating flow in the subdermal plexus between cutaneous territories, equilibrating flow and pressure. The valved cutaneous veins drain via plexi to the deep veins.