Advertisements
Advertisements
Question
Which one of the following does not have valves?
Options
Heart
Arteries
Capillaries
Veins
Advertisements
Solution
Arteries
Veins carry deoxygenated blood (except pulmonary vein) from various parts of the body to the heart. The blood in veins flows with less pressure. Therefore, veins have valves to prevent the backflow of blood. The arteries carry blood from the heart to the other body parts. The blood in arteries flow at high pressure and so the blood flows only in one direction. So, arteries do not require valves as the chances of backflow are less. The heart has valves between the atria and ventricles. They prevent the backflow of blood from the ventricles to the atria.
APPEARS IN
RELATED QUESTIONS
Sketch and label the T.S. of vein.
Why does the heart need valves?
Fill in the blank with suitable word given below:
The colour of a red blood cell is due to _______________.
What is the role of haemoglobin in the blood ?
Fill in the blank.
The fluid part of blood is called _______.
Which of the following statement is true (T) and which ones are false (F)? Mark T or F:
People with blood group ‘O’ are called universal recipients.
Describe the functions of Platelets.
Why is a person having blood group AB called universal recipient and a person with blood group O called a universal donor?
Write in brief about the following:
Blood groups
How many litres of blood does an adult human body have?
The blood vessel supplying blood to the kidney is the
Study the following diagram carefully:
(a) With which figure in the chapter can you roughly compare this diagram?
(b) Write any two things shown in it as extra from those in the figure named above.
Name the Following
The blood vessel leaving the left ventricle of the mammalian heart
Name the Following
The blood vessel that begins and ends in capillaries.
Name the Following
The blood vessels which have valves in them.
The blood vessel that supplies oxygenated blood to the liver.
Long answer question:
Describe the histological structure of the artery, vein, and capillary.
Which type of blood flows through pulmonary veins?
Identify the CORRECT statement regarding pulse.
Select the INCORRECT statement.
