Skin Basics
This is the largest organ in the body.
What is skin?
This is the top layer of the skin
What is the epidermis?
This layer of the skin contains blood vessels, sweat glands, and nerves.
What is the dermis?
The skin protects against this type of radiation.
What is ultraviolet (UV) radiation?
This is the layer below the dermis.
What is the hypodermis?
These are the two main layers of the skin.
What are the epidermis and dermis?
These cells in the epidermis produce melanin.
What are melanocytes?
These glands in the dermis produce an oily secretion called sebum.
What are sebaceous glands?
The skin removes waste through this process.
What is sweating?
These cells in the hypodermis help insulate the body and provide cushioning.
What are fat cells?
The integumentary system has four main functions. Name two of them.
What are protection, temperature regulation, UV protection, and waste removal?
These flattened cells make up the top layer of the epidermis and produce keratin.
What are squamous cells?
Name three structures found in the dermis.
What are blood vessels, sweat glands, nerves, sebaceous glands, and hair follicles?
The skin helps regulate body temperature by doing these two things.
What are sweating and changing blood vessel size?
These white blood cells in the hypodermis help fight infections.
What are macrophages?
The three main parts of the integumentary system
What are skin, hair, and nails?
This tough, fibrous protein helps strengthen the skin.
What is keratin?
These tube-like pockets in the dermis produce hair, which provides protection and insulation.
What are hair follicles?
These structures in the dermis send signals to the brain about temperature, pressure, and pain.
What are nerves?
The hypodermis connects the skin to these two structures.
What are muscles and bones?
This layer, located below the skin, contains fat cells.
What is the hypodermis?
These rectangular cells at the base of the epidermis divide rapidly and push new cells upward.
What are basal cells?
These structures in the dermis produce a liquid that helps cool the body and remove waste.
What are sweat glands?
The epidermis is constantly shedding and replacing cells for this reason.
What is to maintain a strong and protective outer layer?
Macrophages in the hypodermis help the immune system by doing this.
What is engulfing and digesting foreign substances and cellular debris?