BLOOD CIRCULATION SYSTEM

Blood circulation is the process by which blood travels through the body, delivering oxygen and nutrients to cells while removing waste products. This process is essential for maintaining life and ensuring that all parts of the body function properly. In this blog post, we will explore the mechanics of blood circulation, its importance, and the various ways in which it can be optimized for optimal health.

The Mechanics of Blood Circulation

Blood circulation is powered by the heart, which pumps blood throughout the body. Blood flows from the heart into the arteries, which carry oxygen-rich blood to the body\’s tissues. The arteries then divide into smaller vessels called arterioles, which deliver the blood to the capillaries.

Capillaries are the smallest blood vessels in the body, and they are responsible for delivering oxygen and nutrients to the cells while removing waste products. After the blood has passed through the capillaries, it returns to the heart through the veins, which carry oxygen-depleted blood.

The Importance of Blood Circulation

Blood circulation is essential for maintaining life and ensuring that all parts of the body function properly. It is responsible for delivering oxygen and nutrients to the cells while removing waste products, which is critical for maintaining the body\’s metabolic processes.

Good blood circulation is also important for maintaining a healthy immune system. The blood contains white blood cells, which are responsible for fighting off infections and diseases. If blood circulation is compromised, the immune system may not function properly, leaving the body vulnerable to infections.

Optimizing Blood Circulation for Optimal Health

There are several ways to optimize blood circulation for optimal health. These include:

  1. Exercise: Regular exercise is one of the best ways to improve blood circulation. Exercise increases the heart rate, which helps to pump more blood throughout the body. It also strengthens the heart muscle, which can improve its ability to pump blood.
  2. Diet: A healthy diet is essential for maintaining good blood circulation. Eating a diet rich in fruits, vegetables

The circulatory system involves all the organs and tissues which are concerned with the movement of materials from one part of the body to another where they are either used or removed. These organs and tissues include the heart, the blood and the blood vessels.

COMPOSITION OF BLOOD

Blood is a fluid tissue. It is made up of two parts:
The fluid plasma and the blood cells or corpuscles.

(1) Plasma: Plasma is the liquid portion of the blood. It is made up of water, blood protein like globulin, fibrinogen, prothrombin, dissolved mineral salts and other organic substances like hormones, enzymes, digested food and waste products within the body.

(2) The blood cells (corpuscles): There are three blood cells or corpuscles. These are
(i) Red Blood Cells (Erythrocytes): These are biconcave and circular in shape, non-nucleated when matured. They are manufactured by the bone marrow and any excess is stored in the spleen. Erythrocytes contain an iron pigment called haemoglobin which helps to transport oxygen.
(ii) White Blood Cells (Leucocytes): They are irregular in shape, larger but fewer than red blood cells. They have a nucleus and are produced in the lymphatic tissues. The phagocytic leucocytes attack and destroy foreign organisms in the body. In other words, white blood cells defend the body against foreign germs.
(iii) The Blood Platelets (Thrombocytes): They are irregular or star-shaped, tiny and non-nucleated. They are produced in the red bone marrow. The white blood cells are responsible for the clotting.

FUNCTIONS OF THE BLOOD

(1) It maintains body temperature by distributing heat during circulation.
(2) The red blood cell carries oxygen with the help of haemoglobin to different parts of the body.
(3) It transports hormones from ductless glands to their areas of activities
(4) It transports waste products like carbon dioxide, mineral salts, urea, and water to where they are removed.

(5) Leucocytes help to defend the body against germs
(6) It helps in blood clotting with the aid of platelets.
(7) It also helps to transport digested food to the cells
(8) It also helps to maintain the water level of the body

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THE HEART

The heart is the most powerful organ in the circulatory system. It helps to pump blood around the body. Each pumping action of the heart is known as a heartbeat.

The heart is made up of muscles called the cardiac muscles which contract and relax continuously, making the heart to beat ceaselessly. It is covered and protected by a thick membrane called pericardium which keeps the heart in good position in the thoracic cavity.

The heart consists of four chambers: The upper auricles (right auricle and left auricle) and the lower ventricle (right ventricle and left ventricle the heart into right and left halves
Between the left auricle and the left ventricle is an aperture guarded by a bicuspid or mitral valve and another valve. The tricuspid and the right ventricles. These valves only permit one direct flow of blood.
Heartbeat occurs in two stages:
(i) Diastole (ii)systole

(i) Diastole: At this stage, the two auricles contract, creating high pressure in the blood which causes the bicuspid and tricuspid valves to fold downward, thus allowing blood to flow from the auricles into the ventricles. Deoxygenated blood enters the right ventricle from the right auricle while oxygenated blood enters the left ventricle from the left auricle.
(ii) Systo: During this stage, the two ventricles contract, creating high pressure in the blood which causes the two valves to Close. Deoxygenated blood from the right ventricle passes into the pulmonary artery while oxygenated blood from the left ventricle passes into the aorta. Whi1 this happens blood from the body is filling up the auricles again. The first stage of the next heartbeat then follows after a short lapse of time and the cycle repeats itself.

The Blood Vessels:

The blood vessels are the network of spaces in the body through which materials are moved from one part of the body to the other with the aid of blood.
There are three types of blood vessels these are:
(i) The artery which carries blood away from the heart. it is further divided to form arterioles
(ii) The vein which carries blood to the heart. It is further divided to form veinous
(iii) The Capillaries are tiny blood vessels found around tissues and organs where the artery and vein meet. It is at this region that substances diffuse in and out of the blood.

DIFFERENCES BETWEEN ARTERY AND VEIN

ARTERY VEIN
1 It carries blood away from the heart It carries blood to the heart
2 All arteries except the pulmonary artery carry oxygenated blood All veins except the pulmonary vein carry deoxygenated blood
3 It has a thick, elastic and muscular wall It has a thin, less elastic and non-muscular wall

4 It has valves to prevent reflux of blood No valves
5 It lies deep in the muscles It lies near the body\’s surface
6 It has blood which flows rapidly under high pressure It has blood which flows under low pressure

The flow of blood through the heart and the three blood vessels

Circulatory System in Farm Animals

Farm animals possess a Close circulatory system. This means that there is no mixing of oxygenated blood and deoxygenated blood in the heart. Farm animals also display a pattern of double Circulation This implies that, for one Complete circulation, blood has to pass through the heart twice, each time going through a separate Pathway. The two pathways are referred to as pulmonary circulation and system circulation.
Pulmonary circulation is the movement of blood between the heart and the lungs while systemic circulation is the movement of blood between the heart and all parts of the body besides the lungs.

IMPORTANCE OF THE CIRCULATORY SYSTEM

(i) it circulates nutrients to the body tissues
(ii) it removes waste products from the body\’s tissues
(iii) it assists in heat distribution in the body
(iv) it assists in the distribution of oxygen and removal of carbon dioxide from the body tissues.
(v) It contains white blood cells which help in combating diseases.
(vi) It helps in turgidity
(vii) It ensures blood circulation in the body
(viii) It transports hormones and enzymes within the body

  1. economic tools for nation building
  2. budgeting
  3. factors affecting the expansion of industries
  4. mineral resources and the mining industries
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