Blood : It is reddish coloured vascular tissue that flows inside blood vessels by means of pumping activity of heart, pH is 7.4. Colour is bright red in oxygenated form and purple in deoxygenerated form Blood has two parts, fluid plasma (55%) and blood cells (45%).
There are three types of blood cells
1. Red blood Cells.
Lymph : It is light yellow fluid connective tissue which is formed from tissue fluid and filtered out blood. Lymph is devoid of red blood corpuscles and blood platelets. Proteins are fewer, so are white blood corpuscles. However, lymphocytes are most abundant. Lymph flows lymph capillaries and lymph vessels. All places they pass through lymph nodes and lymph organs where lymphocytes multiply and mature. They are also sites for entrapping microbes. Lymph’s is ultimately passed into blood. Most of the organs and tissues pour their secretions and excretions into lymph instead of blood. Lymph’s is middle man between tissues and blood.
Serum: Serum is plasma from which fibrinogen is removed.
