How is the amount of urine produced regulated?
Amount of urine produced depends on the amount of excess water and dissolved waste present in the body. Other factors may be environment and ADH hormone which regulates the production of urine.
Enzymes secreted in small intestine.
Compare the functioning of alveoli in the lungs and nephrons in the kidneys with respect to their structure and functioning.
What are the differences between the transport of materials in xylem and phloem?
Describe double circulation of blood in human beings. Why is it necessary?
What would be the consequences of a deficiency of haemoglobin in our bodies?