8
E. Long Answer Type Questions
1. Give differences between arteries and veins.
2. Observe the given diagram and answer the following questions:
(a) Label the parts numbered 1-8.
(b) What is the function of part 5?
(c) Which veins carry oxygenated blood?
(d) What type of blood does part 2 carry?
3. (a) Name the chambers of heart.
(b) Which chamber of heart receives oxygenated blood?
(c) Why do oxygenated blood and deoxygenated blood not mix in the heart?
4. (a) Name different excretory organs present in human body.
(b) Which excretory product is removed by each of these organs?
(c) What is the function of sweat glands?
Answers
Answer:
Arteries are blood vessels responsible for carrying oxygen-rich blood away from the heart to the body. Veins are blood vessels that carry blood low in oxygen from the body back to the heart for reoxygenation
The heart consists of four chambers in which blood flows. Blood enters the right atrium and passes through the right ventricle. The right ventricle pumps the blood to the lungs where it becomes oxygenated. The oxygenated blood is brought back to the heart by the pulmonary veins which enter the left atrium
Organs of excretion make up the excretory system. They include the kidneys, large intestine, liver, skin, and lungs. The kidneys filter blood and form urine. They are part of the urinary system, which also includes the ureters, bladder, and urethra.