Circulatory System
Circulatory system circulates the blood throughout the whole body. It consists of heart, blood and blood carrying tubes. Heart pumps pure blood to different parts of the body through fine tubes called arteries.
The impure blood from different parts of the body is carried back of the heart by another kind of fine tubes called veins.
|
Heart is the most important and sensitive part of the body. It is situated in the chest slightly to the left side of it. It contracts and relaxes regularly. It makes a very soft sound which is called heart-beat. It can be heard by placing an ear on the chest or can be felt by placing a palm on it. |
If we hold our right wrist between thumb and first two fingers of the left hand, we feel something beating. This is known as pulse. It is the indication of heart-beat.
Note: Doctors use stethoscope to measure the heart-beats.
When the heart contracts, it pumps blood into arteries and when it swells, it sucks the blood back through veins.
From Circulatory System to HOME PAGE
Recent Articles
-
Eleventh Grade | Eleventh Grade Science | Eleventh Grade Math
Jun 27, 25 12:26 AM
Eleventh grade biology has been designed in accordance with the recommended topics. We will cover all the topics in biology very exciting and interesting way. -
Explain Digestion of Food | Salivary Glands | Oesophagus | Stomach
Jun 27, 25 12:20 AM
Before the digestion is start by the different enzymes secreted from the different digestive glands food must be turned and chut or mixed with saliva inside the mouth. -
Explain Human Digestive System | Mouth | Tongue | Pharynx | Teeth
Jun 21, 25 01:15 PM
Digestive system is a system of alimentary canal and digestive glands. Alimentary canal- alimentary canal is a tube of variable diameter having muscular wall and glandular epithelial tissues which sta… -
Vernalisation in Plants | Definition | Mechanism | Devernalization |
Jun 18, 25 01:34 PM
Definition of vernalisation- The change of flowering habit due to the low temperature treatment is known as vernalisation. This is a physiological process which was denoted by Clipart in 1857 invite b… -
The Food We Eat | Food we Get from Plants and Animals | Carbohydrates
Jun 15, 25 03:20 PM
What are the food that we should eat? Find out the names of ten food items in the word maze. Write the names in the correct column of the table given below. Food we get from plants Food we get from an…
New! Comments
Have your say about what you just read! Leave me a comment in the box below.