By @forensicfield

Introduction (Matrix or Matrices)

📌Matrix or matrices is the material in animal or plant cells, in which more specialized structures are embedded, and a specific part of the mitochondrion.

📌Any material substance in the universe wherein the active constituent may be dispersed, accumulated, left, absorbed or chemically bound.

📌The internal structure of connective tissues is an extracellular matrix.

Matrices are classified in Three types:

• Biological
• Non- Biological Matrices
• Viscera

Biological

• Stomach Contents
• Gastric Lavage
• Intestinal Contents
• Stool
• Viscera
• Brain Matter
• Faecal Matter
• Vomit
• Urine
• Saliva
• Bone
• Hair
• Blood
• Skin
• Nails

Non- Biological Matrices

• Water
• Vegetables
• Tea
• Milk and milk products
• Coffee
• Food and Food products
• Wines
• Fruits
• Drinks
• Cereals 
• Pulses
• Cooked materials
• Remnants or traces of poison in small container, etc.

Viscera

Internal Organs, such as:

• Liver
• Kidney
• Stomach
• Uterus
• Heart
• Lungs
• Intestine
• Gall bladder
• Brain, etc.

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