Tissue Repair and Injury Healing Process

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Questions and Answers

What is the primary role of fibroblasts in injury repair?

To detect nerve damage
To initiate inflammation
To regenerate muscle tissue
To produce collagen and contribute to scar tissue formation (correct)

Nerve cells are capable of dividing and replacing damaged tissue.

False (B)

What type of tissue forms within 3-5 days after an injury as part of the healing process?

granulation tissue

Within 24 hours of an injury, leukocytes will start to come to the area and initiate the __________ process.

<p>inflammation</p> Signup and view all the answers

Match the cellular component to its function in the injury repair process:

<p>Leukocytes = Initiate inflammation and fight infection Fibroblasts = Lay down collagen for scar tissue Nerve endings = Signal pain and injury Skin cells = Rapidly divide and help in surface repair</p> Signup and view all the answers

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Study Notes

Injury Repair by New Connective Tissue Replacement

Immediate Effects of Injury

Finger is sliced during cooking, causing blood to come out
Tissues cut through: fingernail, epithelial (skin), muscle tissue, and nerve endings

Nerve and Skin Cell Behavior

Nerve cells do not divide
Skin cells divide frequently

Inflammation Process (Within 24 hours)

Leukocytes arrive at the area
Fibroblasts come to the area and lay down collagen and components that will form a scar
Connective tissue starts to repair the injury

Scar Tissue Formation (3-5 Days)

A new scar tissue forms to fill in the place of nerve and new skin tissue
Granulation tissue (pinkish tissue) is formed, typically visible around the scab