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Title: Structure and Function of Heart, Veins and Arteries, Grade 8 & O-levels Biology
Description: These notes, for students of grade 8 and especially O-levels, have a thorough explanation on the structure and function of hearts, arteries and veins. There is a detailed explanation on the circulatory system of the human body which would help in a clear understanding of how blood flows in the heart and then how it is transferred throughout the body. Get an amazing grade through these notes!
Description: These notes, for students of grade 8 and especially O-levels, have a thorough explanation on the structure and function of hearts, arteries and veins. There is a detailed explanation on the circulatory system of the human body which would help in a clear understanding of how blood flows in the heart and then how it is transferred throughout the body. Get an amazing grade through these notes!
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Structure and Function of Heart, Veins and Arteries,
Grade 8 & O-levels Biology
Written by:- Maria Batool
Table of Content
How the blood in our body is transferred?
How is blood transported?
Heart
Arteries
Veins
Coronary Artery Diseases
Risk Factors:
1
...
Age Factor:
3
...
Smoking:
5
...
In this lesson, we will study the structure and function of the heart, veins
and arteries
...
It is located on the middle left-side of the
chest
...
First, what is your heart made of? It is made of 4 different chambers
...
On the upper right side of the heart we have vena cava which is divided into
superior vena cava and inferior vena cava
...
Both of them are veins
...
It starts in the upper right atrium where the deoxygenated blood
enters the heart
...
That's where the blood mixes with the oxygen
...
And then this oxygenated blood, passing through the semilunar valve
also called the aortic valve, is pumped out throughout the body through the aorta,
the main artery
...
Arteries have
narrow lumen
...
They
have elastic and muscular tissues
...
Veins have wide lumen which decreases
the pressure and have valves to prevent the backflow of the blood
...
Coronary Artery Diseases
Heart is a vital organ in the human body and is essential for human survival,
however there are some diseases such as the coronary artery diseases which affect
our heart
...
There are 5 risk factors which cause coronary diseases
...
Junk Food:
Junk food is one of the causes
...
Cholesterol
deposits in the lumen causes clot in the blood which blocks the valves, resulting in
high chances of heart attack
...
Age Factor:
Age factor is another major cause
...
Stress increases the blood pressure which
can injure the coronary walls and can cause leakage of blood
...
3
...
Males have particularly high blood
pressure and are more likely to be affected by cardiovascular diseases
...
4
...
5
...
Diseases that are passed to the offsprings
by the parents, some diseases like diabetes cause high blood pressure and
hardening of walls
Title: Structure and Function of Heart, Veins and Arteries, Grade 8 & O-levels Biology
Description: These notes, for students of grade 8 and especially O-levels, have a thorough explanation on the structure and function of hearts, arteries and veins. There is a detailed explanation on the circulatory system of the human body which would help in a clear understanding of how blood flows in the heart and then how it is transferred throughout the body. Get an amazing grade through these notes!
Description: These notes, for students of grade 8 and especially O-levels, have a thorough explanation on the structure and function of hearts, arteries and veins. There is a detailed explanation on the circulatory system of the human body which would help in a clear understanding of how blood flows in the heart and then how it is transferred throughout the body. Get an amazing grade through these notes!