Draw a labelled diagram of sectional view of human heart of human digestive system.

What are the differences between the transport of materials in xylem and phloem?

Compare the functioning of alveoli in lungs and nephrons in the kidneys with respect to their structure and functioning.

What is the role of folowing: (i) Lymph (ii) RBCs?

Define translocation with respect to transport in plants. Why is it essential for plants? Where in plants are the following synthesised:

(a) Sugar (b) Hormone?