Essay On Blood Circulatory System

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TYPES OF BLOOD CIRCULATORY SYSTEM
Single circulatory system: This is a system where blood passes through the heart once when it makes a complete circuit round the body. (E.g fish)
Double circulatory system: This involves a system where the blood passes through the heart twice when it makes a complete circuit round the body as in the case of humans.

COMPONENTS OF THE CIRCULATORY SYSTEM
BLOOD
 BLOOD VESSELS
HEART
BLOOD:
Blood is an important fluid in humans and other animals. It provides nourishment to all body organs, tissues and cells. The blood also carry away waste materials that are not needed in the body again. Blood in a human is about 5dm3 with a mass of about 5kg. The blood comprises of a few cells suspended in the blood plasma. The blood plasma is a pale yellow liquid which is mostly water with a variety of dissolved substances in it.

FUNCTIONS OF THE BLOOD
• The blood distributes heat round the body.
• The blood acts as a buffer as many blood proteins have to ability to neutralize excess alkali or acid thus maintaining blood pH.
• It aids in the body’s defense against disease.
• The blood aids in salt and water balancing in the body
• It aids in gaseous exchange as it transport oxygen.
COMPOSITION OF BLOOD
• Blood plasma
• Red blood cells
• White blood cells
• Platelets
Blood Plasma: The blood plasma makes about 55% of the human blood and 45% is made of cells. The pH and salt concentration of the blood plasma is controlled by the kidneys. The blood plasma contains hormones and salts, it also excretory product such as carbon dioxide, urea and uric acid. Food molecules such as glucose, fatty acids and amino acid dissolves in the blood plasma. Most importantly, blood plasma contains plasma proteins which are essen...

... middle of paper ...

...tment:
 The sufferers might be treated with the use of calcium channel blockers which will expand the affected arteries so that blood can flow more freely.
 The use of anticoagulants which will prevent blood from clotting in the diseased arteries.
 Medical practitioners advise low-fat diet to individuals.
Inflammatory Heart Disease:
This disease involves inflammation of the heart muscles or the surrounding tissues, which may be caused by bacterial, viral, or fungal infections, or by immune diseases. Those most at risk include individuals who had a congenital birth defect or previous injury to the heart, intravenous drug users, and those with an artificial heart valve.
Symptoms:
 shortness of breath
 swelling in the feet and ankles
 fatigue
Treatment:
 This depends on the extent of the damage to the heart muscle and typically involves medications or surgery.

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