Medical Science

  The Major Components of Human Blood

Plasma: When plasma is centrifuged. The blood plasma is a light yellow liquid, similar to the color of straw. Along with water, plasma carries salts and enzymes. The primary purpose of plasma is to transport nutrients, hormones, and proteins to the parts of the body that need it.

Platelets: Platelets are tiny fragments of cell. They are the cells that are responsible for creating a blood clot when you get a cut on your skin. If one of your blood vessels gets damaged, it sends out signals that are picked up by platelets. They also send out chemical signals to attract more platelets to pile onto the clot in a process called aggregation.



White Blood Cells: White blood cell are the cells that are responsible for fighting infection and disease. The number of white blood cells increases when a person is fighting an infection or a disease and decreases when a person is healthy.


Red Blood Cells: Red blood cells are  contain a chemical called hemoglobin that carries oxygen around your body. Red blood cells are made inside your bone, the Bone marrow.

The Mechanics of Breathing 

When breathing in the diaphragm contracts to expand the chest cavity. The Diaphragm then flattens and moves downwards. The air then moves through your windpipe which is called the Trachea. The Trachea which then divides into two passage ways, the Bronchi. The air which then moves into a more narrow and tighter space that is called the Bronchioles. At the end of the Bronchioles there is a group of tiny air sacs. These air sacs have bulges called Alveoli, to increase their surface area and speed up the absorption of oxygen. In the alveoli the Carbon Dioxide that comes from the body switches up with the Oxygen that came from your Trachea, after the switching process we breathe out thus making our diaphragm relaxes and returns to its original position pushing the Carbon Dioxide out from the body.