This book is organized into 12 chapters and begins with an overview of the structure and function of skin, and then discusses the epidermis and its structural features. Special consideration is given to the life cycle of epidermal cells; the properties and function of stratum corneum; and other cells in the epidermis including melanocytes, the cells of Langerhans, and Merkel cells. The chapters that follow focus on age-related changes in the dermis, cutaneous blood flow, changes in skin circulation, and the dermal nerve network. The book also considers hair growth and differentiation; the effects of malnutrition on the morphology of hair roots; and the structure and development of the nails. A chapter describing the cytochemistry and pharmacology of eccrine sweat glands concludes the book.
This book is written primarily for dermatologists, whether seasoned veterans or neophytes, and will also be useful to all biologists who are interested in biomedical disciplines.
This book provides a concise multi-disciplinary insight into the biology, physiology, and chemistry of black skin. Primary emphasis is on the nature and origin of the pigmentary color and how this is related to specific properties of black skin, such as photoprotection and low incidence of skin cancers, that are lacking in white skin. Other topics covered include dermatology and cosmetics of black skin from a practical viewpoint of skin care and current treatments of pigmentary disorders. Black Skin is accessible to a broad range of readers from graduate students to specialists in physical anthropology, skin biology, dermatology, and cosmetology, as well as medical practitioners.Explains the molecular basis of racial color differences and the chemistry of melaninCovers the biologic uniqueness of black skin, including: Lack of elastosis in young skin; Keloid formationIncludes pigmentary disorders of black skinAddresses the cosmetics of black skin
This book is composed of nineteen chapters, and begins with the mechanism of tissue homeostasis in adult mammals and the kinetics of epidermal reaction to carcinogenic agents and other skin irritants. The succeeding chapters deal with the growth promoting effects of tumors on tissues, the reaction pattern distinctions between normal and neoplastic epithelium, and some biological implications of chemical carcinogenesis. Considerable chapters are devoted to various carcinogens, including hydrocarbons, viruses, androgens, and estrogens. Other chapters consider the physicochemical mechanisms of acceleration of skin carcinogenesis and experimental observations of environmental carcinogenesis. The mechanisms of skin cancer induction due to ultraviolet radiation, as well as arsenic induced tumors are examined. The concluding chapters describe some forms of skin tumors, such as adnexal tumors and basal cell epithelioma.
This book will prove useful to oncologists and researchers in the field of carcinogenesis.
The book opens with a chapter on the embryology of hair. Separate chapters follow on the anatomy and histochemistry of the hair follicle; the electron microscopy of keratinized tissues; the chemistry of keratinization; the mitotic activity of the follicle; and the the vascularity and patterns of growth of hair follicles. Subsequent chapters deal with behavior of pigment cells and epithelial cells in the hair follicle; the nature of hair pigment; the effects of nutrition on hair growth; and effects of chemical agents, ionizing radiation, and particular illnesses on hair roots.
This book is organized into 14 chapters, and starts with an introduction to the sebaceous glands. The subsequent chapter deals with the sebaceous glands in oral and lip mucosa. These topics are followed by discussions on ectopic sebaceous glands and the structure of sebaceous glands of man. Other chapters describe the effect of age and sex on the metabolism of rat, as well as the problems in the analysis of sebum. The last chapters consider the hormonal control of sebaceous glands in both animals and humans.
This book will be of value to biologists and research workers.
The selection first offers information on the pattern of cutaneous innervation of the human hand, foot, and breast and similarities in cutaneous nerve end-organs. Discussions focus on the methods of study, observations, histochemical reactions, and function of end-organs. The text then examines the autonomic innervation of the skin, cholinesterases in the cutaneous nerves of man, and the relation of nerve fiber size to modality of sensation.
The manuscript ponders on the central paths of the afferent impulses from skin that arouse sensation and studies related to the mechanism of common sensibility, including materials and methods, anatomical and physiological observations, and interpretation of observations. The publication also takes a look at the structures and processes involved in the sensation of itch and the pathophysiology of itch sensation.
The selection is a dependable reference for readers interested in the biology of skin.
The volume contains 37 papers and opens with an introductory chapter on keratinization, focusing on the history of the keratohyalin granules, the role of lipids in the orderly keratinization of the epidermis, and the desquamation process. Subsequent chapters present studies on topics such as the behavior of the skin; the effects of various experimental conditions on keratinization in organ culture; and the localization and the regional variability in the concentration epidermal enzymes.