Integumentary System Flashcards
page 62-63
What are the three layers of the skin?
Epidermis, dermis, and subcutaneous layer.
What is the primary function of the epidermis?
It acts as a waterproof barrier and prevents pathogens from entering the body.
What is the role of the subcutaneous layer?
It provides insulation, stores fat, and helps shape the body.
Name three types of skin glands and their functions.
Sudoriferous glands (sweat), sebaceous glands (sebum for lubrication), and ceruminous glands (earwax).
What is the function of guard hairs and downy hairs in animals?
Guard hairs protect the skin and affect appearance, while downy hairs provide insulation.
How do horns differ from antlers?
Horns are made of keratin surrounding bone, while antlers are bone covered in velvety skin that is shed as they grow.
What are the two main types of hair in mammals?
Guard hair and downy hair.
Explain the role of keratin in the integumentary system.
Keratin strengthens hair, nails, claws, and skin, providing protection and support.
What adaptation allows Arctic foxes to survive in cold climates?
Their thick fur and insulating undercoat reduce heat loss.
