The following points highlight the four types of human excretory system. The types are: 1. Kidney 2. Ureters 3. Urinary bladder 4. Urethra. Human Excretory System: Type # 1. Kidney: There is a pair of kidneys which are dark-red, bean shaped, each with a notch, (concavity), the hilus (= hilum) on its inner side. Blood vessels, lymph vessels, nerves and [...]
Artificial kidney is a haemodialysis machine through which the toxic substances are removed from the blood of a person whose kidneys are completely damaged. Haemodialysis (Gr. haima = blood, dia = through, lyo = separate) is the process of diffusion across a semipermeable membrane to remove unwanted substances from the blood while adding desirable components. The pores in the membrane [...]
In this article we will discuss about the roles of different organs in excretion. Role of Lungs in Excretion: Human lungs regularly remove about 18 L of CO2 per hour and about 400 ml of water per day in normal resting condition. Water loss through the lungs is small in hot humid climate and large in cold dry climate. Thus [...]