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प्रश्न
Blood consists of two parts - a liquid part and a cellular part. Name these parts and briefly write about them
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उत्तर
Plasma: The plasma is a light-yellow coloured, alkaline liquid which mainly consists of:
- Water- 90-92%
- Proteins – 7-8%
- Inorganic salts – 1%
- Other substances – traces
Cellular elements : These elements are of three categories:
- Red blood cells (erythrocytes)
- White blood cells (leukocytes)
- Blood platelets (thrombocytes)
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संबंधित प्रश्न
Which organ acts as a pump in the circulatory system?
Why do people have a common belief that the heart is located on the left side of the chest?
Give reason for the following:
Only the veins and not the arteries are provided with valves.
Given diagram shows a simple diagram of the circulation of blood in a mamma showing the
main blood vessels, the heart, lungs and body tissues. The blood vessel, labelled 6, contains
deoxygenated blood and the valve leading to it has three semi-lunar pockets.
(a) Name the blood vessels and organs marked by numbers 1 to 8.
(b) What is meant by the term ‘double circulation’ of blood in mammals?
(c) what is diastole?
[There is an “error” in the diagram. According to the usual practice the pulmonary (lung)
circulation is shown upward and the systemic downward, but here it is reversed].
Given below is a highly schematic diagram of the human blood circulatory system.
Which numbers represent the following respectively?
Aorta
Hepatic portal vein
Pulmonary artery
Superior vena cava
Renal vein
Stomach
Differentiate between the following pair of terms: Vena Cava and Aorta
Fill in the blanks with suitable words given below:
The blood loaded with carbon dioxide from the body comes into the ______ of the heart.
Use your brain power!
How is the air that we inhale purified in our body?
Explain the main parts of the circulatory system.
______ refers to a marked decrease in the number of platelets.
