Histology of moose (<i>Alces alces andersoni</i>) interdigital glands and associated green hairs

The study examined the interdigital glands of moose (Alces alces andersoni), noting their distinct lighter epidermis, green hairs, and large sebaceous and sweat glands. Both sexes and all ages exhibited a shallow fore pocket and deep hind pocket in the glandular area. The research utilized 250 μm thick sections to reveal the pilosebaceous–sweat gland unit. The secretory cycle of apocrine cells and its relationship with the lipofuscin cycle were detailed, with macrophages ingesting lipofuscin from dying apocrine cells. The green hairs showed a transmittance peak at 515 nm, though the chemical nature of the coloring matter remained unknown, likely being an organic compound bonded to keratin. The green secretion from sweat glands was believed to dye the hair, and the sebaceous gland volume increased during the rut in both sexes.