28. Why is blood a connective tissue?
Blood is a very important transporting liquid of our body. It
transports oxygen to all tissues and takes Carbon dioxide away to the
lungs. It also carries food materials to the liver and other tissues and
waste chemicals from the liver to the kidneys.
The blood is made of three main kinds of cells that are suspended in
a pale liquid called plasma. Plasma constitutes 55 percent of the
blood. It contains proteins, minerals, food chemicals and waste
chemicals.
The three kind of cells are: Platelets, that help in clotting of blood;
white blood cells that fight disease; and red blood cells that carry
Oxygen. The red blood cell contain the red pigment haemoglobin,
which picks up oxygen at the lungs and releases it into the tissues of
the body.
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