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Chocolate-brown blood due to methemoglobinemia. Signs and symptoms of methemoglobinemia (methemoglobin level above 10%) include shortness of breath, cyanosis, mental status changes (~50%), headache, fatigue, exercise intolerance, dizziness, and loss of consciousness.
It is bluish chocolate-brown in color. In human blood a trace amount of methemoglobin is normally produced spontaneously, but when present in excess the blood becomes abnormally dark bluish brown. The NADH -dependent enzyme methemoglobin reductase ( a type of diaphorase ) is responsible for converting methemoglobin back to hemoglobin .
Blood residue are the wet and dry remnants of blood, as well the discoloration of surfaces on which blood has been shed. In forensic science, blood residue can help investigators identify weapons, reconstruct a criminal action, and link suspects to the crime. [1] Analysis of blood residue is also an important technique in archeology. [2]
Blood is composed of blood cells suspended in blood plasma. Plasma, which constitutes 55% of blood fluid, is mostly water (92% by volume), [2] and contains proteins, glucose, mineral ions, and hormones. The blood cells are mainly red blood cells (erythrocytes), white blood cells (leukocytes), and (in mammals) platelets (thrombocytes). [3]
This may be why the condition is often referred to as the "mask of pregnancy." How is melasma diagnosed? Most doctors usually diagnose melasma during a clinical exam. "It's confirmed using a Woods ...
Arterial blood, which is already oxygenated, is also already a brighter shade of red— this is the blood seen from a pulsating neck, arm, or leg wound, and it does not change colour upon exposure to air. [4] The colour "blood red", therefore, covers both these states: the darker deoxygenated colour and the brighter oxygenated one.
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If a peace lily’s leaves turn brown, it may be getting too much sun. The brown could be sun scald. Fix It: Move your peace lily to a spot where it gets indirect sunlight. 9. Old Age.