Integumentary System Functions and Structures

This lecture covers the accessory structures of the skin, including hair, nails, and glands. It explains the structure and function of hair and hair follicles, compares sweat and sebaceous glands, and describes nail anatomy. The integumentary system's components are detailed, highlighting their roles in protection, sensation, and regulation.

What are the main components of the integumentary system?

• Heart, lungs, and blood vessels

• Brain, nerves, and spinal cord

• Bones, muscles, and joints

• Skin, hair, nails, and glands

What is the primary function of hair follicles?

• To produce sweat

• To protect nails

• To generate hair

• To secrete oil

What is the role of the erector pili muscle?

• To produce sebum

• To cool the body

• To make hair stand up

• To protect the nail

What substance do sebaceous glands secrete?

• Keratin

• Sebum

• Sweat

• Melanin

Where are sebaceous glands primarily located?

• Hands and feet

• Face, chest, and back

• Scalp and neck

• Armpits and groin

What is the main function of ecrine glands?

• To cool the body

• To secrete a milky sweat

• To produce oil

• To protect the skin

Where do apocrine glands empty their secretions?

• Directly onto the skin surface

• Into hair follicles

• Into the bloodstream

• Onto the nail plate

What is the primary composition of the sweat produced by apocrine glands?

• Water and salt

• Melanin and enzymes

• Lipids and proteins

• Sebum and keratin

What is the main structure of the nail called?

• Nail matrix

• Nail plate

• Nail fold

• Nail bed

What does the term 'hyponychium' refer to?

• The skin layer above the nail fold

• The skin layer below the free edge of the nail

• The skin layer to the side of the nail plate

• The skin layer covering the nail matrix