3. How do tubular glands differ in structure from saccular glands? What is a racemose gland? Why so called?
4. Describe the nature of the secretory process.
5. What conditions render necessary the formation of waste materials in the body? Why must these be removed?
6. How do the waste materials get from the cells to the organs of excretion?
7. Show by a drawing the connections of the kidneys with the large blood vessels and the bladder. Name parts of drawing.
8. In what do the uriniferous tubes have their beginning? In what do they terminate? With what are they lined?
9. Why should the blood pass through two sets of capillaries in the kidneys?
10. Bright's disease of the kidneys affects the uriniferous tubes and interferes with their work. What impurity is then left in the blood?
11. Trace water and salts from the Malpighian capsules to the bladder, naming parts through which they pass.
12. Trace carbon dioxide from the cells to the outside atmosphere.