We all know how fingerprints are made. The ridges on our fingers transfer material to other objects. Click on the bold text below to visit web sites and learn about the pores in our fingers, why we have ridges on our fingers and more!

How and where do our bodies produce the oil that forms latent fingerprints?

What is friction skin?

Does friction skin have glands that produce oil?

Do we sweat from friction skin?

How do oils get onto the ridges of our fingers? 

Why do we have the adaptation of friction skin?

The above questions may be answered using:

  What is friction skin?

Draw a picture of an oil gland which is also known as the sebaceous gland. Also draw a picture of a sweat gland or eccrine gland. Use the images below to assist you. Be sure to draw and label the following sebaceous gland, papilla of hair, hair shaft, sweat gland sweat pore, epidermis and dermis. Click on the images below to get larger images.

Also, answer the question

Oil glands are always found next to a _________ .

  Skin, sweat glands, and oil glands

 What does sweat on your fingers look like really close up? Click on the image below to get a sharper and larger image.  Sweat on finger (2010)

Can children's fingerprints disappear more quickly than adult's fingerprints? Why? The answers are found in the abstract of this research paper.  Note: In order to see the abstract and the document, click on the "view document" button on the following web page.   Fingerprint differences between children and adults

Can you get DNA from a smudged fingerprint? 

PCR helps to create DNA profiles from fingerprints

DNA profiles from fingermarks Jennifer E.L. Templeton and Adrian …