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What are the common causes of necrosis?
Necrosis is the death of cells in your body tissues. It can occur due to injuries, infections, diseases, lack of blood flow to your tissues, and extreme environmental conditions. Some common causes of necrosis include spider bites, gangrene, bed sores, necrotizing fasciitis, osteonecrosis, frostbiteRead more
Necrosis is the death of cells in your body tissues. It can occur due to injuries, infections, diseases, lack of blood flow to your tissues, and extreme environmental conditions. Some common causes of necrosis include spider bites, gangrene, bed sores, necrotizing fasciitis, osteonecrosis, frostbite, and avascular necrosis.
See lessWhat are the different causes of cell injury?
There are four types of cell injury: 1. Necrosis, 2. Apoptosis, 3. Autophagy, and 4. Necrosis with apoptosis. Cell injury can be: 1. Reversible or 2. Irreversible, and 3. Can be caused by mechanisms such as mitochondrial damage, abnormal calcium homeostasis, DNA damage, membrane damage, endoplasmicRead more
There are four types of cell injury:
1. Necrosis,
2. Apoptosis,
3. Autophagy, and
4. Necrosis with apoptosis.
Cell injury can be:
See less1. Reversible or
2. Irreversible, and
3. Can be caused by mechanisms such as mitochondrial damage, abnormal calcium homeostasis, DNA damage, membrane damage, endoplasmic reticulum (ER) stress, and oxidative stress. Cell death is a state in which the cell ceases to carry out functions.
What are the different causes of cell injury?
Cell injury can be caused by a variety of factors, including physical agents, chemical agents, drugs, lack of oxygen, nutrient imbalances, infections, immune issues, or genetic issues. Physical agents such as heat, radiation, and mechanical trauma can damage cells. Lack of oxygen or glucose, or impaRead more
Cell injury can be caused by a variety of factors, including physical agents, chemical agents, drugs, lack of oxygen, nutrient imbalances, infections, immune issues, or genetic issues. Physical agents such as heat, radiation, and mechanical trauma can damage cells. Lack of oxygen or glucose, or impaired production of ATP can also deprive cells of essential materials needed to survive. Infections, immune issues, and genetic issues can also cause cell injury.
See lessWhat are the different characteristics of benign tumour?
A benign tumor is an abnormal but noncancerous collection of cells also called a benign neoplasm. Benign tumors can form anywhere on or in your body, but many don’t need treatment. A benign tumor has distinct, smooth, regular borders. A benign tumor can become quite large, but it will not invade neaRead more
A benign tumor is an abnormal but noncancerous collection of cells also called a benign neoplasm. Benign tumors can form anywhere on or in your body, but many don’t need treatment. A benign tumor has distinct, smooth, regular borders. A benign tumor can become quite large, but it will not invade nearby tissue or spread to other parts of your body.
See lessWhat are the characteristics of malignant tumour?
A malignant tumor is a group of diseased cells defined by one of three characteristics: uncontrolled growth, invasion and damage of healthy cells, or metastasizing (spreading) to other organs of the body. They differ from benign tumors, which do not spread or affect other areas of the body. A malignRead more
A malignant tumor is a group of diseased cells defined by one of three characteristics: uncontrolled growth, invasion and damage of healthy cells, or metastasizing (spreading) to other organs of the body. They differ from benign tumors, which do not spread or affect other areas of the body. A malignant tumor has irregular borders and grows faster than a benign tumor. A malignant tumor can also spread to other parts of your body.
See lessWhat are the modes of spreading of malignant neoplasm?
There are three primary ways tumors can spread to distant organs: 1) Through the circulatory (blood) system (hematogenous), 2) Through the lymphatic system, and 3) Through the body wall into the abdominal and chest cavities (transcoelomic).
There are three primary ways tumors can spread to distant organs:
See less1) Through the circulatory (blood) system (hematogenous),
2) Through the lymphatic system, and
3) Through the body wall into the abdominal and chest cavities (transcoelomic).
How does granulation tissue formed?
Granulation tissue is new connective tissue and microscopic blood vessels that form on the surfaces of a wound during the healing process. It typically grows from the base of a wound and is able to fill wounds of almost any size. The extracellular matrix of granulation tissue is created and modifiedRead more
Granulation tissue is new connective tissue and microscopic blood vessels that form on the surfaces of a wound during the healing process. It typically grows from the base of a wound and is able to fill wounds of almost any size. The extracellular matrix of granulation tissue is created and modified by fibroblasts. Initially, it consists of a network of type-III collagen, a weaker form of structural protein that can be produced rapidly. This is later replaced by the stronger, long-stranded type-I collagen, as evidenced in scar tissue.
See lessWhat are the factors that affect the wound healing process?
Wound healing can be affected by intrinsic, extrinsic, and iatrogenic factors. Intrinsic factors are related to the overall state of health of the patient, such as age, body type, chronic disease, immunosuppression, nutritional status, and hormonal levels. Extrinsic factors are related to the externRead more
Wound healing can be affected by intrinsic, extrinsic, and iatrogenic factors. Intrinsic factors are related to the overall state of health of the patient, such as age, body type, chronic disease, immunosuppression, nutritional status, and hormonal levels. Extrinsic factors are related to the external environment and conditions of the wound, such as dehydration, blood supply, sepsis, and occlusive dressing. Iatrogenic factors are related to the medical interventions and treatments that can influence wound healing, such as medications, radiation therapy, and surgery. These factors can delay or complicate the wound-healing process by affecting cellular functions, immune response, and tissue repair.
See lessWhat are the differences between primary and secondary wound healing?
Primary and secondary wound healing differ in the way the wound is closed and the time it takes for the wound to heal. Primary wound healing, or primary intention wound healing, occurs in wounds with dermal edges that are close together. The wound is closed using staples, stitches, glues, or other fRead more
Primary and secondary wound healing differ in the way the wound is closed and the time it takes for the wound to heal. Primary wound healing, or primary intention wound healing, occurs in wounds with dermal edges that are close together. The wound is closed using staples, stitches, glues, or other forms of wound-closing processes. This reduces the tissue lost and allows the body to focus on closing and healing a smaller-area wound rather than the larger initial wound. It is usually faster than secondary intention.
Secondary wound healing, or secondary intention wound healing, occurs when a wound that cannot be stitched causes a large amount of tissue loss. Doctors will leave the wound to heal naturally in these cases. This may be more common for wounds that have a rounder edge, cover uneven surfaces, or are on surfaces of the body where movement makes stitches or other closure methods impossible. Secondary wound healing relies on the body’s own healing mechanisms. This process takes longer, which may be due to increased wound size, the risk of infection and contamination, and other factors.
See lessWhat are the sequence of events in primary wound healing?
Primary wound healing, or primary intention wound healing, occurs in wounds with dermal edges that are close together. It is usually faster than secondary intention and occurs in four stages: Haemostasis, Inflammation, Proliferation, and Remodelling. In Haemostasis, the action of platelets and cytokRead more
Primary wound healing, or primary intention wound healing, occurs in wounds with dermal edges that are close together. It is usually faster than secondary intention and occurs in four stages: Haemostasis, Inflammation, Proliferation, and Remodelling. In Haemostasis, the action of platelets and cytokines forms a hematoma and causes vasoconstriction, limiting blood loss in the affected area. The close proximity of the wound edges allows for ease of clot formation and prevents infection by forming a scab. In Inflammation, a cellular inflammatory response acts to remove any cell debris and pathogens present. In Proliferation, cytokines released by inflammatory cells drive the proliferation of fibroblasts and the formation of granulation tissue. Angiogenesis is promoted by the presence of growth mediators, allowing for further maturation of the granulation tissue; the production of collagen by fibroblasts allows for the closure of the wound after around a week. In Remodelling, collagen fibers are deposited within the wound to provide strength in the region, with the fibroblasts subsequently undergoing apoptosis.
See less