A bruise appears as a greenish spot in the skin because ?...

A bruise appears as a greenish spot in the skin because ? bilirubin from iron recycling has built-up in the bruise. ? the heme group in the hemoglobin has broken down into biliverdin. ? red blood cells lyse releasing biliverdin from inside. ? hemoglobin has leaked from the blood into the injury and hemoglobin has a green color. ? dead white blood cells accumulate at the site of injury.

Transcript

00:01 Hello students, in this video i will be answering two questions beginning with the first one that is question number 29.

00:08 Here in this question we need to select a correct statement.

00:13 The statement which mentions hemocedrin pigment is formed in macrophages, hematoidin occurs in areas of hemorrhage and hemoglobin stains tissues red is the correct statement.

00:26 Hemocedrin is a iron storage pigment that is formed by macrophages.

00:33 It is typically found in macrophages of tissues particularly in the areas of chronic bleeding or iron accumulation.

00:41 Hemocedrin appears as yellow brown or golden brown granules and can be visualized under microscope.

00:49 Hematoidin on the other hand is a yellow or brown pigment that can occur as a result of breakdown of hemoglobin during resolution of hemorrhage.

01:00 It is formed when red blood cells are broken down and the released hemoglobin is metabolized.

01:07 Hematoidin is often seen in areas of old or resolved hemorrhages and contributes to the color changes observed in healing bruises.

01:18 Next, hemoglobin in our red blood cells is responsible for carrying oxygen from the lungs to other tissues.

01:26 When red blood cells break down, the hemoglobin releases iron.

01:30 This iron ion is trapped and stored as hemocedrin in tissues underneath the skin.

01:38 This causes visible hemocedrin staining.

01:42 Therefore, this option is correct answer for 29.

01:46 Next, question number 30...

Question

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