Biology
Write one important role of each of the following:
- Erythrocytes
- Thrombocytes
- Arteries
- Vena cavae
- Heart
Answer
Erythrocytes contain an iron and protein compound called Haemoglobin that acts as the "oxygen-carrier".
The Thrombocytes help in the clotting of blood which prevents excessive blood loss and direct entry of disease causing germs into the blood through cuts and open wounds.
Arteries are crucial blood vessels that carry the blood away from the heart (oxygenated blood) to different parts of the body.
The vena cava's primary role is to return deoxygenated blood from the body back to the heart.
The heart, acting as a pump, pushes and receives the blood to and from the whole body through the blood vessels.
Related Questions
Define the terms given below :
- Haemoglobin
- Capillaries
- Aorta
- Universal donor
- Blood pressure
Correct the following statements by changing the first/ last word only :
- Robert Hooke identified the different types of blood groups.
- A faster heart beat is usually an indication of hypotension.
- WBCs produce special substances called antigens.
- Thrombocytes contain haemoglobin.
- Arteries possess valves.
What are the two diseases in which the number of platelets in the human body are lowered to a great extent ?
Name the three kinds of blood vessels found in human beings. With the help of suitable diagrams, differentiate between them.