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A tumor is an abnormal growth of body tissue Tumors can be cancerous or noncancerous: Anatomy and Physiology Assignment, OU, Ireland

University The Open University (OU)
Subject Anatomy & Physiology

A tumor is an abnormal growth of body tissue. Tumors can be cancerous or noncancerous.

In general, tumors occur when cells divide and grow excessively in the body. Normally, the body controls cell growth and division. New cells are created to replace older ones or to perform new functions. Cells that are damaged or no longer needed die to make room for healthy replacements.

If the balance of cell growth and death is disturbed, a tumor may form.

Problems with the body’s immune system can lead to tumors. Tobacco causes more deaths from cancer than any other environmental substance.

The skin acts as a sense organ because the epidermis, dermis, and hypodermis contain specialized sensory nerve structures that detect touch, surface temperature, and pain. These receptors are more concentrated on the tips of the fingers, which are most sensitive to touch, especially the Meissnercorpuscle, which response to light touch, and the Pacinian corpuscle, which response to vibration.

Merkel cells, seen scattered in the stratum basale, also touch receptors. In addition to these specialized receptors, there are sensory nerves connected to each hair follicle, pain and temperature receptors scattered throughout the skin, and motor nerves innervate the arrector pili muscles and glands. This rich innervation helps us sense our environment and react accordingly.

A spinal cord injury is the result of damage to the nerve tissue enclosed within the spine which relays messages between the brain and the rest of the body. Because of the importance of the spinal cord, damage to this tissue can cause a host of issues throughout the rest of the body. Pressure sores are a common repercussion of spinal cord injuries.

Pressure sores, which are also referred to as bedsores, pressure ulcers, or skin breakdown, are the result of an area of skin or underlying tissue that has been damaged due to the loss of blood flow. In order for the skin to be healthy, it needs a constant source of blood, otherwise, it can become infected and even stop functioning completely.

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