Final answer:
Blood is the highly complex mixture of cells, enzymes, proteins, and inorganic substances. It consists of cellular elements and plasma, containing proteins like albumin and immunoglobulin, and performs essential functions such as transporting nutrients and removing waste.
Step-by-step explanation:
The highly complex mixture of cells, enzymes, proteins, and inorganic substances is a) Blood. Blood is a fundamental fluid in the human body that performs the critical functions of transporting and delivering nutrients and oxygen to body cells. It also removes metabolic waste to be excreted. Blood consists of several different types of cells such as red blood cells, white blood cells, and platelets, all suspended in plasma. Plasma itself is rich in proteins including antibodies, and it carries dissolved solutes throughout the cardiovascular and lymphatic systems.
Contrary to some misconceptions, while urine is a complex fluid composed of waste substances, it does not contain cells or large proteins as blood does. Saliva, although it does contain the enzyme lipase, is not as complex in cellular composition as blood. Lymph is similar to blood plasma but has fewer blood cells.
Hence, blood, with its complex composition of cellular elements and plasma, which includes a matrix, ground substance, and fluid with proteins like albumin and antibodies, fits the description most accurately.