The exhaust fumes from a garage in a place that uses petrol of high sulphur content are bound to contain?

Explanation

Blood has four main components: plasma (55%, liquid carrying nutrients, hormones, waste), red blood cells (carry oxygen using hemoglobin), white blood cells (fight infection), and platelets (enable clotting).

Red cells are biconcave discs without nuclei, maximizing surface area for oxygen. White cells (various types) identify and destroy pathogens. Platelets are cell fragments that clump to seal wounds.

Blood types (A, B, AB, O) determined by antigens on red cells. Rh factor (positive/negative) adds another classification. Matching blood types is essential for safe transfusions.