Blood

• Plasma is the liquid portion of the blood.
• White blood cells, or leukocytes, help protect the body from infection and disease.
• Platelets are involved in clotting.
• Blood is classified into red blood cells, white blood cells, and platelets.
• Blood platelets protect the body from excessive blood loss by blocking ruptured blood vessels when we are wounded.
• Red blood cells carry oxygen to all parts of the body.
• Red blood cells contain hemoglobin which carries oxygen to all parts of our bodies.
• Neutrophils fight bacterial infections
• Red blood cells (RBC) carry oxygen to all parts of the body.
• RBC has no nucleus because its main function is to transport oxygen throughout the body.
• The biconcave shape of RBC allows it to squeeze through narrow capillaries.
• Platelets prevent bleeding by forming clots at injury sites.
• White blood cells (WBC) defend against infection and disease.
• Platelets are small, colorless cell fragments that play an important role in clotting or coagulation.
• There are three types of WBC: neutrophils, lymphocytes, and monocytes.
• Neutrophils are the most abundant type of white blood cell and are involved in fighting bacterial infections.
• Lymphocytes produce antibodies that fight viruses and other foreign substances.
• Monocytes are large phagocytic cells that engulf bacteria and debris from damaged tissues.
• phagocytes: engulf and digest invading microorganisms