The Human Circulatory System
Photo Credit: by Biology Pages
Hello, Friends, and Fellows!
As I have said in my previous blog, I will write about our bodies or human health. First I will try to elaborate our wonderful body structure and its functions, after that I will also try to write something about Human health. So, let’s start the Human Body.
The Circulatory System
Video Credit: by Dale Holadia via YouTube
The human body consists of many organ systems which help the human body to perform his works. Every system is cooperative to others.
▄ The Human Circulatory System:
This system consists of the following important organs:
The heart, the blood vessels and the blood contained in them, make up the system called “Circulatory System” of the human body.
Photo Credit: By M. Elizabeth Rogers, Bernard Edward Matthews Via Encyclopædia Britannica, Inc
The most important of the circulatory system is a large pumping organ, the heart. The vessels taking blood away from the heart are called "Arteries". However, arteries bringing blood back to the heart are called "Veins". Both arteries and veins are quite large and joined to each other by very tiny vessels. These vessels are called “capillaries”.
The smallest vessels are making a network in the tissues of organs which meant for the exchange of gases, food wastes through their thin walls.
■ Heart:
Photo Credit: BY DR. BENTEU DARIUS+ Via Heart Update
The heart is a very important part of this system. It pumps the blood to the body organs. The heart has four chambers, which performs his work earnestly. The blood enters the upper chambers; the upper chambers pumped it into the lower chambers when all the blood pumped into lower chambers. It's pumped to the lungs and other parts of the body by lower chambers.
■ Arteries:
Photo Credit: By The Editors of Encyclopædia Britannica Via Encyclopædia Britannica, Inc
Arteries also a part of this system, the blood can’t be reached to the body organs without Arteries. When the heart pumped the blood, it’s a duty of the arteries to reach it to the human body organs. Arteries are very long and spread throughout the body. The blood is taking away from the heart to the human body organs by arteries
■ Veins:
Photo Credit: By Dorling Kindersley via Fact Monster
The vessels which bringing blood back to the heart are called veins. Like Arteries, Veins are also very long and spread throughout the body. The blood which has been used by the body organs reach back to the heart to gain oxygen by veins. Veins have the used blood which they get from body organs. When any body organ uses the oxygen in the blood, they leave it in the veins, and it’s a duty of the veins to reach it back to the heart for gain more oxygen.
■ Capillaries:
Photo Credit: By Wikipedia
The Artery and Vein joined by the capillaries. The capillaries make a huge network and they help to enable the exchange the water, oxygen food, gases and wastes between the blood and the tissues. The capillaries exchange the used and useable blood between arteries and veins. They get useable blood by arteries and when the tissues exchange the minerals, food and gases, it transferred to the veins to get back to the heart. The capillaries have three main types, continuous, fenestrated, Sinusoid.
■ Blood Vessels:
Photo Credit: by Wikipedia
Blood moves around in the body through a system of tubes called “Blood Vessels”.
■ Blood:
It consists of two components i.e. PLASMA and CORPUSCLES, Plasma is the liquid part of the blood. It is yellowish in colour.
Photo Credit: By Web MD
The corpuscles are the cells suspended in the plasma. There are three types of cells, red blood corpuscles (RBC), white blood corpuscles (WBC) and platelets. RBC helps in transporting oxygen to different cells in the blood. WBC protects the body against infection and platelets assist in clotting of blood. Clotting is very important for our life.
■ Pulse:
If you place your two fingers on the inner side of the wrist of any person, a sort of beat will felt under the finger. This beat or jerk is called PULSE.
Photo Credit: by Healthwise Staff Via Health Link BC
■ Heart Beat:
If you place your hand on the left upper side of your chest, you will feel a beat or jerk here, like (DHAK, DHAK, DHAK) this beat or jerk is called HEART BEAT.
How to Check Your Pulse | How to Feel Your Heart Beat
Video Credit: Health Guides Via YouTube
■ Transport of Materials through Blood:
Photo Credit: by The A Level Biologist
The digested food is one of the substances, which the blood carries. The food is digested in the food canal. Food is broken down to smaller and simpler substance in the food canal (where food is digested). The simpler substances pass through the walls of the small intestine and enter the blood in the nearby capillaries.
From here, the food flows into all other vessels of the body. With the help of blood, food reaches up to different parts of the body. Our body is able to perform various functions due to food. Oxygen is another substance, which is carried by blood in all parts of the body. Oxygen comes from the air that we breathe into our lungs. Oxygen must be present in the body before food can be made use of it.
Blood also carries waste substance from all parts of the body to certain organs, which helps to get rid of them. Carbon dioxide is one of these waste substances. It is dissolved in the blood and is carried to the lungs where it is breathed out.
The white cell of the blood plays an active role against harmful germs, which have entered the body. So, we can say that blood and its components help us to fight against various diseases.
So, here it is not finished here, but I thought its enough to write here, let me clear one thing, its not an easy job to write about any topic, specially on bitlanders, we have to fulfill the requirements of Maam Hillary to reach and gain higher score, so its never an easy job for me to write here, but i always tried my best and write my good words here. So your comments will appriciate my work. Thanks
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