Sebum: a mixture of triglycerides, cholesterol, proteins, and inorganic salts. This mixture coats the surface of hairs and helps them from drying and becoming brittle. It prevents excessive evaporation of water from the skin. It also inhibits the growth of some bacteria.
Sudoriferous (sweat) glands
There are 3 to 4 million Sudoriferous glands. The cells of these glands release sweat, or perspiration, into hair follicles or onto the skin surface through pores. Horses sweat by means of apocrine glands only. Compared to other species, the sweat glands of horses are especially active and readily produce visible sweat during exercise and under conditions of high temperature and high humidity.
Ceruminous glands
Ceruminous glands are modified sweat glands located in the inner ear that produce a waxy secretion called cerumen . The secretory portions lie in the subcutaneous layer deep to the sebaceous glands. Their excretory duct opens either directly onto the surface of the external auditory canal (ear canal) or into the ducts of the sebaceous glands. Cerumen: the combination of ceruminous and sebaceous glands is a yellowish material called Cerumen. This provides a sticky barrier that impedes the entrance of foreign bodies and insects. It also waterproofs the canal and prevents bacteria and fungi from entering cells.
C. Hooves
Hooves are analogous to the fingernails of humans. The hoof wall consists of the epidermis which is insensitive as it contains no nerves or blood supply. The dermis of the hoof is just deep to the epidermis and it is sensitive as it contains nerves and has a blood supply to nourish both the dermis & epidermis. The hoof is to protect the distal extremities.
83
Made with FlippingBook Publishing Software