Question

nonspecific defense

1. in response to the wound and invading pathogens, white blood cells called mast cells release histamines, which stimulate increased blood flow to the area.
2. local blood vessels dilate. fluid leaves the capillaries and causes swelling. white blood cells called phagocytes move into the tissue from the blood.
3. phagocytes engulf and destroy the bacteria and damaged cells.

so...
● in the example, where might the pathogen be?
● how does the increased blood flow to the area help the body attack invading pathogens?
● why does the wound turn red? tallest person at table 6

Explanation:

1. The pathogen might be in the tissue near the wound, as the splinter has broken the skin barrier allowing bacteria (pathogens) to enter.
2. Increased blood - flow brings more white blood cells (phagocytes) to the area. These cells can engulf and destroy the pathogens. Also, it brings more nutrients and oxygen to support the immune response and tissue repair.
3. The wound turns red because histamines released by mast cells cause local blood vessels to dilate. This increased blood - flow to the area makes the wound appear red.

Answer:

1. In the tissue near the wound.
2. Brings more white blood cells (phagocytes) and nutrients/oxygen for immune response and repair.
3. Due to dilated blood vessels from histamine release increasing blood - flow to the area.