IMMUNOLOGY

OVERVIEW OF THE IMMUNE SYSTEM

THE GOOD BAD AND UGLY OF THE IMMUNE SYSTEM

Question [CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
What role does our circulatory system have with regards to fighting infection?
A
circulates white blood cells to lymph to fight infection
B
circulates red blood cells and white blood cells to fight infection
C
circulates lymph and red blood cells to fight infection
D
None of the above
Explanation: 

Detailed explanation-1: -Two distinct fluids move through the circulatory system: blood and lymph. Blood carries oxygen and nutrients to the body’s cells, and carries waste materials away. Blood also carries hormones, which control body processes, and antibodies, to fight invading germs.

Detailed explanation-2: -Fights infection. The lymphatic system helps defend the body against illness-causing germs, bacteria, viruses and fungi. The system builds immunity by making special white blood cells (called lymphocytes) that produce antibodies which are responsible for immune responses that defend the body against disease.

Detailed explanation-3: -Throughout the day, blood vessels and muscles produce waste that enters the vessels in the lymphatic system. Lymph nodes pull out the waste, and then the filtered fluids travel to the lymphatic ducts and are redistributed into the blood.

Detailed explanation-4: -A type of blood cell that helps the body fight infection and diseases. White blood cells are made in the bone marrow and are found in the blood and lymphatic tissue. They play an important role in immune response (the immune system’s reaction to the presence of foreign substances in the body). Also called leukocyte.

Detailed explanation-5: -The lymphatic system emerges from tissue spaces as a fine meshwork of vessels. It is a complex fluid drainage system. Normal blood circulation forces fluid out of the bloodstream, where it is filtered by lymph nodes to get rid of bacteria and abnormal cells.

Detailed explanation-6: -There is no pump in the lymphatic system like the heart in the cardiovascular system. The pressure gradients to move lymph through the vessels come from the skeletal muscle action, respiratory movement, and contraction of smooth muscle in vessel walls.

There is 1 question to complete.