Blood and It’s Vessel System

Topics: Blood, Heart, Red blood cell Pages: 6 (1618 words) Published: May 23, 2013

The images above shows the structure of haem (iron is shown in red). Images from Haemoglobin, BioNet

The images above shows the structure of haem (iron is shown in red). Images from Haemoglobin, BioNet

Erythrocytes, also known as ‘Red Blood Cells’, is one of the cells in our body that makes our blood. Erythrocytes are supported by many of other components in making blood. They are a disk shaped a cell which are filled with an iron contain pigment called haemoglobin . Haemoglobin is what makes blood red by strongly binding itself to oxygen and carbon monoxide. Our blood circulates around are body bringing us the oxygen which is bound to the haemoglobin in the red blood cells. Red blood cells are squishy so there are able to squeeze through capillaries. Erythrocytes most important function is to transport oxygen around the body.

Structure of Erythrocytes:

* Erythrocytes do have a nucleus but once they mature they have no nucleus. * Erythrocytes have a haem which is an active component of the prosthetic group. Haem also relies on the present of oxygen and it also makes oxyhaemoglobin by combing itself with oxygen. * Erythrocyte gets broken down and then gets transported via the blood to get recycled in the liver so that new erythrocytes can use it. * Erythrocytes only last for 120 days.


Thrombocytes are also known as platelets which is the smallest type of blood cell. Thrombocyte come from a large cell called a megakaryocyte. When bleeding occurs the platelets get to work and start to swell and clump the blood together to form a type of seal to help reduce the amount of bleeding that occurs but on other hands if there are too many pallets then it increases the risk of a blood clot forming into a vessel. This concludes that the main importance of thrombocytes is to reduce major bleeding.

Structure of Thrombocytes:

* Thrombocytes are spherical, oval or rod-shaped and have a colourless body. * Thrombocytes have an approximate diameter of between 2 to 4 µ (1 micro-metre = 1 μ = 0.000001m) * Thrombocytes DON’T have a nuclei and cannot reproduce * Thrombocytes on other hand do behave functionally as a whole cell * Around half of thrombocytes are removed whilst in the spleen.

When Thrombocytes are under a microscope they appear to look like:

* Flattened discs
* As having a cell membrane
* Also having a Cytoplasmic matrix.


Leukocytes or also known as white blood cells play an important part in our everyday life. Leukocytes are there to help protect are bodies from infection and disease. There are two major types of Leukocytes which both have different types of themselves all to help with the protection. The types are listed below.

•Granulocytes – These are responsible mainly for the digestion of endocytosis particles which our in our blood. There are three different types if granulocytes and their names come from their staining properties.

* Neutrophils- filled with neutrally-staining granules or tiny sacs of enzymes that which help protect from viruses. The mature neutrophil has band shaped nucleus which of course is called a band. The neutrophil also only lasts for around 3 days which then its replace with a new one. Neutrophils act as a defence against micro-organism invasion, especially bacteria. They are active phagocytes of small particles and are sometimes known as microphages to distinguish them from macrophages which are larger cells.

* Basophils- Basophils are rare and they only make up less than 1% of the white blood cells in our bodies. These cells originate in bone marrow which is where they are created by stem cells. They flow throughout the body via the blood and when a infection occurs basophils respond to help fight the infection along with a number of other types of blood cells. It also has been researched that these cells don’t only help with infections but also help the body’s...
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