Effects of solar radiation / UV radiation – Skin grafting
Effects of solar radiation / UV radiation
Invisible light forms a part of the electromagnetic spectrum
immediately beyond the violet end of the visible light spectrum (i.e. between
visible light and X-rays). Long wavelength ultraviolet light (i.e. that nearest
visible light) is often termed as UVA; intermediate wavelength ultraviolet light
is designated UVB; and short wavelength ultraviolet light (i.e. that nearest
X-rays) is called UVC.
The main source of UV radiation is the sunlight; others are UV lamps
and welder’ arcs. UV light penetrates the skin for a few millimeters only so
that its effect is limited to epidermis. In human excessive exposure to UV
rays can cause various forms of skin cancer such as squamous cell carcinoma,
basal cell carcinoma and malignant melanoma.
The efficiency of UV light as carcinogen depends upon the extent of light-absorbing protective melanin pigmetation of the skin. Fair skinned people and whites are more prone to skin complications due to UV exposure. People living close to the equator, outdoor workers and farmers in Tropics are exposed to light radiations.
Skin grafting
Skin grafting is a technique used in plastic surgery to repair areas of
lost or damaged skin. A piece of healthy skin is detached from one part of
the body and transferred to the affected area. New cells grow from the graft
and cover the damaged area with fresh skin.
Skin taken from an identical twin can be used for a graft, but skin from
another person or an animal is soon rejected by the recipient body. A skin
graft is performed because the area is too large to be repaired by stitching or
because natural healing would result in scarring that might be ugly or restrict
movement.
Most grafts are performed by removing skin from the donor site and
transferring to the recipient site.
Related Topics in Zoology:
Bio Zoology All Important Topics
- Human Physiology Introduction
- Nutrition
- Carbohydrates Poly hydroxyaldehydes (or) ketones
- Proteins (Polypeptides)
- Lipids
- Vitamins – Functions Of Vitamins
- Deficiency of Vitamin
- Minerals – Water – Role of water
- Balanced diet
- Obesity
- Digestive System
- Dental Caries (Tooth decay)
- Root Canal Treatment
- Peptic ulcer
- Hernia and Types
- Appendicitis (Appendix)
- Gall Stones
- Hepatitis
- Fractures – Types of fractures
- Mechanism of fracture
- Dislocation of joints
- Arthiritis
- Rickets and Osteomalacia – Orthopedics
- Muscles
- Mechanism of muscle contraction
- Types of muscle contraction
- Myasthenia Gravis
- Respiration – Process of pulmonary respiration
- Mechanism of Breathing
- Regulation of Respiration
- Pneumonia Tuberculosis Symptoms Treatment
- Bronchitis – Acute bronchitis, Chronic Bronchitis Causes
- Circulatory System – Functioning of Human heart
- Cardiac Cycle
- Coronary blood vessel and its significance
- Myocardial infarction
- Angina pectoris
- Angiogram – Angioplasty
- Atherosclerosis
- Heart block Echo cardiography Heart Valves
- Rheumatic Heart Disease (RHD), ICCU – (Intensive Coronary Care Unit)
- Blood Pressure
- Heart transplantation
- Pulse rate
- Cardio Pulmonary Resuscitation (CPR)
- Blood – Composition of plasma – Blood cells
- Clotting of Blood or Haemostasis
- Thrombosis
- Nervous system Co-ordination systems
- The Brain – Fore Brain, Midbrain, Hindbrain
- Memory
- Sleep – Types of sleep
- Stroke – Brain haemorrhage
- Alzheimer – Meningitis (Brain fever)
- Conditioned reflex
- Electroencephalography EEG
- Right and Left brain concept
- Spinal cord functioning
- Chemical co-ordination – Functions of Endocrine glands
- Hypothalamus
- Pituitary gland – hormone
- Hormones of Neurohypophysis – vasopressin
- Thyroid gland
- Parathyroid Gland
- Pancreas
- Adrenal gland
- Gonads
- Receptor Organs – Eye
- Photochemistry of Retinal visual Pigments
- Errors of refraction
- Optometry – Retinopathy
- Cataract – Lens Replacement – Glaucoma – Nyctalopia
- Eye Infections and Eye Care
- Ear
- Mechanism of hearing
- Defects of the ear
- Hearing Aid – Noise pollution
- Skin and functions of skin
- Melanin functions
- Effects of solar radiation / UV radiation – Skin grafting
- Dermatitis
- Tongue – Mechanism of Stimulation
- Excretion Ureotelism Nephron
- Mechanism of urine formation
- Renal Failure, Dialysis, Kidney Machines
- Kidney stone – Kidney transplantation
- Diabetes mellitus
- Functioning of male reproductive system
- Functioning of female reproductive system
- Ovulation and fate of the ovum – Menstrual cycle
- Fertilization
- Birth control