Blood is a complex type of tissue explain
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Blood Definition. ... As cancerous tissue replaces healthy bone marrow tissue, healthy red blood cells, white blood cells, and platelets cannot be made. Despite looking like a simple red fluid, blood is as complex as any tissue in the body.
Blood is the body fluid in humans and other animals that delivers the essential materials for life to the body’s cells. It has sometimes been called a fluid “tissue,” because like solid tissues it contains several types of cells which perform complex functions for the human body.
The components of blood are produced mainly in the bone marrow, where special cells produce red cells, white cells, and platelets. So-called “blood cancers” such as leukemia are actually cancers of the bone marrow. As cancerous tissue replaces healthy bone marrow tissue, healthy red blood cells, white blood cells, and platelets cannot be made.
Despite looking like a simple red fluid, blood is as complex as any tissue in the body. Here we will discuss its functions, its components, and some clinically important characteristics of blood.
Function of Blood
Important functions of the blood include:
Bringing Vital Substances to Cells
Complex multicellular organisms need complex circulatory systems; that’s because we have many cells, and these cells have high metabolisms.
Without highly efficient means of delivering vital substances like oxygen, water, and nutrients, complex and active life forms like ourselves could not exist.
Some of the vital substances which blood delivers to our cells include:
Oxygen – Near-constant supply needed for cellular respiration.
Water – Correct balance needed for enzymatic activity to proceed smoothly.
Nutrients – Fuel for cellular respiration, and necessary materials for cellular maintenance.
Biological building blocks – Molecules out of which replacement parts and daughter cells can be made.
Chemical messages from other cells – Allows body cells to alter their activity appropriately in response to environmental changes.