Explore chapters and articles related to this topic
Biofilms and Materials' Infectivity
Published in Peerawatt Nunthavarawong, Sanjay Mavinkere Rangappa, Suchart Siengchin, Mathew Thoppil-Mathew, Antimicrobial and Antiviral Materials, 2022
Hideyuki Kanematsu, Dana M. Barry, Risa Kawai, Takeshi Kogo, Akiko Ogawa, Paul McGrath, Toshihiro Tanaka
When bacteria and viruses enter the human body, the person's defense systems become active [10, 43-44]. Usually, the defense systems for humans involves three steps. The first one to act is the skin and the mucous membranes that exist in the skin layers. The skin is composed of two layers: the epidermis and the dermis. The epidermis is composed of epithelial cells. They are made of keratin which has high resistance to enzymes and toxins. Therefore, the epidermis can provide a strong defense against bacteria. The dermis has sebaceous glands that secrete oily substances called sebum. These substances have high resistance to many bacteria because they are capable of lowering pH. A mucous membrane (which is epithelium derived from the ectoderm) is always wet with mucosal fluids. Therefore, it can easily trap foreign particles including bacteria.
Occupational Dermatosis and Eye Hazard
Published in Ronald Scott, of Industrial Hygiene, 2018
The surface of the skin grows inward to form a follicle or tube at the base of which the keratin-forming cells construct a shaft of hair. Hair follicles have their roots deep in the dermis. Sebaceous glands, generally associated with the hair follicle, produce sebum (skin oil), which travels up the follicle and coats the surface of the skin. A coating of skin oil repels water and water solutions of chemicals. Sebum accumulates in the follicle if the flow is blocked, causing a skin eruption (pimple, zit). Widespread blockage in follicles is termed acne.
Automated detection, 3D position of facial skin lesions using genetic algorithm and Kinect camera
Published in Computer Methods in Biomechanics and Biomedical Engineering: Imaging & Visualization, 2022
Negarin Javadi, Hadi Soltanizadeh
Acne Vulgaris is a very common skin lesion, which mostly occurred in the adolescent population compare to other ages (Humayun et al. 2012; Liu and Zerubia 2013). Hair follicles and skin glands play an important role in the spread of these lesions. Hair follicles are set in the dermis layer of the skin. sebaceous glands, which are present in the vicinity of hair follicles, produce an oily substance known as sebum. the only way to prevent to cause acne is leaving the sebum of the pore. Acne can be anywhere in the body, but they have appeared in the areas where the glands are located such as face, chest, and shoulders.