Biology
Define the terms given below :
- Haemoglobin
- Capillaries
- Aorta
- Universal donor
- Blood pressure
Answer
Haemoglobin — Haemoglobin is an iron and protein compound that is found within the Red Blood cells. It acts as the "oxygen-carrier".
Capillaries — Capillaries are the terminal branches of an artery, which rejoin to form a vein.
Aorta — The aorta is the largest artery in the body and carries oxygenated blood from the left ventricle to all parts of the body through its branches.
Universal donor — A person with O blood group can give blood to a person of any blood type and is therefore called a universal donor.
Blood pressure — The pressure exerted by the blood on the walls of the arteries while flowing through them is called blood pressure.
Related Questions
Name the disease in which the number of platelets reduces to 25,000 - 30,000 per cu mm of blood. State its major symptoms.
Name the following :
- Three components of circulatory system
- Three kinds of blood vessels
- Three kinds of corpuscles
- Two types of blood circulation in human body
- Four categories of blood groups on the basis of the proteins found on the surface of RBCs.
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.
Write one important role of each of the following:
- Erythrocytes
- Thrombocytes
- Arteries
- Vena cavae
- Heart