Final answer:
Sebaceous and sweat glands secrete substances that can act as a first line of defense against pathogens. Sebum from sebaceous glands has antibacterial properties and forms a barrier on the skin's surface. Sweat from sweat glands contains antimicrobial substances and creates a hostile environment for pathogens.
Step-by-step explanation:
Sebaceous glands produce an oily substance called sebum. Sebum is secreted into hair follicles and makes its way to the skin surface. It waterproofs the hair and skin and helps prevent them from drying out. Sebum also has antibacterial properties, so it inhibits the growth of microorganisms on the skin.
Sweat glands produce the salty fluid called sweat, which contains excess water, salts, and other waste products. The glands have ducts that pass through the epidermis and open to the surface through pores in the skin.
Both sebaceous and sweat glands have secretions that can act as a first line of defense against pathogens. Sebaceous glands secrete sebum, which has antibacterial properties. The slightly acidic film formed by sebum on the skin's surface acts as a barrier to bacteria, viruses, and other potential contaminants. Sweat glands produce sweat, which contains antimicrobial substances like lysozyme and creates a hostile environment for pathogens.