Name the following The gas excreted by lungs as waste product.
Carbon dioxide.
Lung expels carbon dioxide and water vapour (by-products of respiration) through exhalation.
Write answers the following questions.
(a) Name the parts of the human circulatory systems.
(b) What is the function of the circulatory system?
(c) What is meant by excretion?
(d) Name the waste products formed in plants.
(e) How are waste products in plants given out?
(i) Why is the removal of feces from the alimentary canal not considered as excretion?(ii) Name the waste products excreted by lungs and skin.