Sebaceous (oil) gland is a type of gland that is found in the dermis and associated with the hair follicle. It is a type of holocrine secretion, in which cells of the gland degenerate and release the content, known as … Continue reading Sebaceous/Oil gland
Eccrine sweat glands are the more common type of sweat glands and they can be found everywhere but predominantly on palms and soles. They are composed of both simple and stratified cuboidal epithelial cells. These glands secrete sweat that contains … Continue reading Eccrine sweat gland
There are four layers of what one consider to be skin, from superficial to deep, they are epidermis, dermis, hypodermis, and deep fascia. Epidermis is formed by stratified squamous epithelial tissue, keratinized type: Dermis has two layers: papillary dermis and reticular … Continue reading Skin Layers
Horizontal sectioning of scalp, a thin skin, can be used to demonstrate the cross section of hair. Continue reading Scalp, horizontal section
Arrector pili is a small, involuntary muscle composed of smooth muscle cell. It attaches to the hair bulb of the hair follicle and act to pull the hair up during cold or emotional distress, forming the “goose bump” on skin … Continue reading Arrector pili
Pacinian corpusles are structures that can be found in the dermis. They are the encapsulated end of a sensory neuron that detects vibration and pressure. The corpuscle resembles a flattened plate. Continue reading Pacinian Corpuscle
Stratified epithelium is classified by the cell type on the uppermost layer. Notice that is true for the pictures shown below. They are typically found in locations where constant abrasion is likely, such as skin. The epithelium at these locations … Continue reading Stratified Squamous epithelium, Keratinized
Dense irregular CT are collagen fibers arranged irregularly, unlike dense regular CT. The result is a tissue type that can withstand tension (pulling) in many directions. One common location where this can be found is in the dermis of skin. … Continue reading Dense Irregular Connective Tissue
Kit Ng, Ph.D. 