Human blood consists of about 22 percent solids and 78 percent water. The components of human blood include:
- plasma, in which the blood cells are suspended, includes the following:
- red blood cells (erythrocytes) - carry oxygen from the lungs to the rest of the body.
- white blood cells (leukocytes) - help fight infections and aid in the immune process.
- Types of white blood cells include the following:
lymphocytes
monocytes
eosinophils
basophils
neutrophils (granulocytes)
platelets (thrombocytes) - help to control bleeding.
fat globules
chemical substances, including the following:
carbohydrates
proteins
hormones
- gases, including the following:
oxygen
carbon dioxide
nitrogen
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