White Blood Cells Essay

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The five main types of white blood cells are neutrophils, monocytes, basophils, lymphocytes, and eosinophils. The most common type of white blood cells are neutrophils. Neutrophils do not live very long, usually only up to 10 hours. They die immediately when a foreign substance is ingested and destroyed. Neutrophils make up 50 to 70% of white blood cells. Until they are alerted to an infection, they are in the bloodstream. They are very quick to responding to infections. Netrophils are granulocytes. Monocytes help to carry out the process of phagocytosis. Monocytes protect the person from pathogens, and remove useless cells from blood. Monocytes are agranular. Basophils only make up about 1% of white blood cells. Basophils respond to infections and inflammation; they release histamines. Scientists believe there is still more to know about basophils, but they do not know what. Basophils are granular. The function of lymphocytes is to recognize and help destroy dangerous foreign substances in the body. Also, lymphocytes can tell when when cells are cancerous or infectious. Lymphocytes are agranulocytes. Eosinophils release toxic substances, and can cause asthma and allergies when they over act and are mass produced in the body. Eosinophils make up 1-6% of white blood cells. Eosinophils are granulocytes.
Topic A3
The four main types of blood are A, B, AB, and O. If a person is given the wrong blood type, the antibodies destroy the cells. A and B are the two types of antigens. If on red blood cells you have the A antigen, you will have type A blood, if you have type B blood on the red blood cells, then you have type B blood, and if you have neither, your blood type is O. If you have type A blood, you have the opposite type of antib...

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When the heart beats, it is called systolic pressure. Between beats, when the heart is resting, it is called diastolic pressure. These two pressures make up the numbers of your blood pressure. For example, if your blood pressure is 130/85, 130 is the systolic pressure while 85 is the diastolic pressure. When you are resting, your blood pressure will be lower than when you are exercising because your heart is not beating as fast.
Topic D2
Your heart is a special type of muscle. Previous to each beat, your heart fills with blood. To get the blood circulating, the muscle contracts. The heart is similar to a pump; the right side takes in the blood from the body and pumps it into the respiratory system, the lungs. The left side pumps the blood to the body and receives the blood from the lungs. The left side and right side's functions are opposite from each other.

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