The veins and arteries play a very important rule in human body.
The Veins and Arteries of the Circulatory System
After watching this video of Veins and Arteries of the Circulatory System, you will learn a a lot of things. In our body, blood circulates and transports nutrients, oxygen, hormones, carbon dioxide and blood cells to and from the cells in the body with the help of Circulatory System. This process is important to provide nourishment. It helps in fighting diseases, stabilize temperature and pH and maintain homeostasis.
How will you define Veins?
- A vein can be defined as a vessel that carries blood to the heart.
Things you should know about veins:-
- Approximately 70% of the entire blood is hold by veins.
- They can be stretched out very easily that too from internal pressure.
- Some veins can tighten in response to nerve stimulation.
- Larger veins have one-way valves to ensure that blood flows in correct direction.
- When valves of veins cease to function, it results in a permanent distension. After that blood flows in opposite direction and gets collected in veins.
- Swollen veins are called varicose. Usually they are blue or purple in colour.
- Weak vein walls and valves can cause varicose veins, which is common condition affecting 35% of adults.
- Any vein can become varicose but we put some extra pressure on our feet by walking and standing. It can cause major varicose veins in certain areas of our feet.
- Women can easily get affected by varicose veins than men.
- As you get older, your veins start to lose their elasticity and valves inside them. It makes them less efficient
Artery is a Greek word that means ‘Windpipe’. An artery is also a blood vessel but it carries blood in opposite direction (away from heart). All the arteries carry oxygenated blood except two of them- Pulmonary and Umbilical arteries.
Fast facts about Arteries:-
- Heart rate is inversely proportional to the body size.
- Blood is up to 92% water.
- Our skin gets 13% of entire water supply.
- All blood vessels’ combined length is close to 55,000-60,000 miles.
- They also transfer heat from blood to body organs.
- There are 3 types of arteries: – (a.) Large (b.) Medium (c.) Small
- They are less than half millimetre in diameter, cannot be seen with human eyes.