Exploring the Integumentary System: Structures and Functions

Mr. Andersen explains the integumentary system, covering its components: skin, hair, and nails. He discusses their protective roles, sensation, thermoregulation, and vitamin D synthesis. The epidermis is detailed with its layers, including the stratum basale and spinosum, and their functions. The dermis and hypodermis are described, highlighting vascular tissue, glands, and receptors. Finally, the formation and function of hair and nails are explained, emphasizing their composition and protective roles.

What are the main components of the integumentary system?

• Stomach, liver, pancreas

• Heart, lungs, kidneys

• Skin, hair, nails

• Bones, muscles, nerves

What is the primary function of the integumentary system?

• Digestion

• Protection

• Respiration

• Circulation

Where does mitosis occur within the epidermis?

• Stratum corneum

• Stratum basale

• Stratum granulosum

• Stratum lucidum

What is the role of melanocytes in the skin?

• Produce oil

• Produce hair

• Produce melanin

• Produce sweat

How are nutrients distributed to the upper layers of the epidermis?

• Through blood vessels

• Through nerves

• By diffusion

• By osmosis

Which layer of the epidermis is only found in thick skin?

• Stratum basale

• Stratum granulosum

• Stratum spinosum

• Stratum lucidum

What type of glands are found in the dermis?

• Thyroid glands

• Salivary glands

• Adrenal glands

• Sweat and sebaceous glands

What is the primary function of the hypodermis?

• To connect skin to muscles

• To produce hair

• To regulate temperature

• To store nutrients

What substance is primarily responsible for the strength of hair and nails?

• Keratin

• Collagen

• Elastin

• Melanin

What evolutionary function do nails serve in humans?

• Temperature regulation

• Tool manipulation

• Aesthetics

• Protection