دانلود کتاب علوم خون – اصول و آسیب شناسی

Put simply – the study of blood. However, as with many questions, a short answer is often inadequate, and this is no exception. Blood itself is a dynamic and crucial fluid providing transport and many regulatory functions and that interfaces with all organs and tissues. As such it has a very important role in ensuring adequate wholebody physiology and homeostasis. It follows that adverse changes to the blood will have numerous consequences, many of which are serious and lifethreatening. Blood itself is water that carries certain cells, and in which are dissolved many ions and molecules. These cells are required for the transport of oxygen, in defence against microbial attack, and in regulating the balance between clotting (thrombosis) and bleeding (haemorrhage). The blood is also an important distributor of body heat. The blood also carries nutrients from the intestines to the cells and tissues of the body. Once these nutrients (and oxygen) have been consumed, the blood transports the waste products of metabolism to those organs where they are removed (that is, are excreted: the lungs and the kidneys). In some particular diseases and conditions (such as diabetes, myeloma, and renal disease), the investigation of urine can be valuable. Although clearly not blood, blood scientists will perform and comment on the analysis of this fluid. Nevertheless, if you define an organ as a collection of diverse tissues with a common overall function, the blood is indeed an organ.