Specialized vascular structure in the skin of the horse.
D000818:Animals; D001158:Arteries / Q000166:cytology; D001163:Arteriovenous Anastomosis / Q000166:cytology; D001808:Blood Vessels / Q000166:cytology*; D006736:Horses / Q000033:anatomy & histology*; D012867:Skin / Q000098:blood supply*; D014680:Veins / Q000166:cytology