Wound Healing Stages

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Questions and Answers

Which of the following events occurs first when the dermis is penetrated?

Regeneration of the epithelium
Arrival of immune cells
Leakage of blood into the wound (correct)
Formation of granulation tissue

Platelets contribute to stopping bleeding by inhibiting clot formation.

False (B)

What type of tissue primarily comprises scar tissue?

collagen fibers

Following the formation of a blood clot, more ______ cells arrive to help clean the wound and reduce the risk of infection.

immune Signup and view all the answers

Which cells work to replace damaged collagen fibers during wound healing?

Fibroblasts (C) Signup and view all the answers

Scar tissue contains neurons and glands, allowing it to fully restore the normal function of the skin.

False (B) Signup and view all the answers

What is the term for the dried-up blood clot that appears on the surface of healing skin?

scab Signup and view all the answers

In which layer of the integument is scar tissue observed after wound healing?

Dermis (B) Signup and view all the answers

__________ assist with early phagocytosis to remove bacteria introduced from the environment during a skin wound.

leukocytes Signup and view all the answers

Match the component with its role in wound healing

Leukocytes = Phagocytosis of bacteria Thrombocytes = Clot formation Fibroblasts = Replace damaged collagen fibers Epithelium = Regenerates to seal the wound Signup and view all the answers

Flashcards

Wound Healing: Step One

Blood vessels are damaged, leading to blood leakage. Leukocytes help with early phagocytosis to remove bacteria.

Wound Healing: Step Two

Platelets plug broken vessels, facilitating clot formation. This ensures bleeding stops and more immune cells arrive.

Wound Healing: Step Three

Fibroblasts replace damaged collagen fibers, blood vessels regrow, and granulation tissue forms for epidermal regeneration.

Wound Healing: Step Four

Epithelium regenerates, sealing the wound. Scar tissue forms in the dermis, and a scab appears on the surface.

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Thrombocytes Role

Plug holes in broken vessels and start clot formation

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Scab

Dried up blood clot on the surface of the skin during wound healing

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Granulation Tissue

Tissue that consists of new connective tissue and tiny blood vessels that form on the surfaces of a wound during the healing process

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Study Notes

Bleeding occurs when the dermis is penetrated, damaging blood vessels
Leukocytes aid early phagocytosis, removing bacteria from the wound
Thrombocytes (platelets) plug broken vessels and facilitate clot formation
Clots halt bleeding, attract immune cells to clean the wound, and lower infection risk
Fibroblasts replace damaged collagen fibers and blood vessels regrow
Granulation tissue forms where the epidermis regenerates
Epithelium regenerates, sealing the wound
Scar tissue (fibrosis) appears in the dermis, consisting mainly of collagen fibers, it lacks neurons and glands, extensive scarring can impair skin function
Fibroblasts continue repairing the papillary and reticular layers of the dermis
A scab (dried blood clot) appears on the skin's surface