How does the skin of your palm differ from that on the back

How does the skin of your palm differ from that on the back (posterior) of your hand? ____ Describe the differences you observed in the type and distribution of hair on the front (anterior) and back (posterior) of your _____ Explain how a hair is formed. What portion of the nail plate is not visible on the body surface when using a hand magnifier? ____

Solution

1) The plam doesnot have hair follices, and it has an extra skin layer for protection

2) Anterior has more hair because it has thicker layer of skin posterior has less and thinner layers than anterior , so less hair

3) Hair formation:

Hair follices are rooted in the scalp , hair has two parts    a) hair bulb

                                                                                           b) hair shaft

hair bulb : it is located based of root , these cells are made up of keratin , a protein rich in sulfur amino acids to form hair.   This is composed of three concentric layers of cells

a) Medulla     b) Cortex     c) Cuticle

4) bed epithelium