Importance of Excretion

We will discuss here about the importance of excretion and some other excretory organs.

We take three types of food protein, carbohydrate and fat. By the catabolism of protein a compound is formed in our body, called ammonia. This harmful toxic material is then modified into urea. It is the main excretory material of human body, which is excreted through urine.

During filtration of blood some essential components also go out from it along with the excretory materials. These include sugars, proteins, essential salts and water. But nephrons send those components back to blood. This is called reabsorption. It is an essential process for our body. Everyday human kidneys separate about 170 litres of filtrate from blood, of which only 1.5 litres are passed out as urine. Remaining water and essential components are reabsorbed into blood to maintain salt and water balance of the body.

Besides kidney some other excretory organs take part in the removal of excretory substances. These are skin, lungs and liver. Sweat comes out through sweat glands of our skin. Through skin some Lungs excretory materials, excess salt and water goes out from our body in the form of sweat. Through lungs we release carbon dioxide; liver helps us to get rid of some unwanted metals and toxic substances.












Fifth Grade

From Human Excretory System to HOME PAGE

New! Comments

Have your say about what you just read! Leave me a comment in the box below.


Recent Articles

  1. Amphibolic Pathway | Definition | Examples | Pentose Phosphate Pathway

    Jun 06, 24 10:40 AM

    Amphibolic Pathway
    Definition of amphibolic pathway- Amphibolic pathway is a biochemical pathway where anabolism and catabolism are both combined together. Examples of amphibolic pathway- there are different biochemical…

    Read More

  2. Respiratory Balance Sheet | TCA Cycle | ATP Consumption Process

    Feb 18, 24 01:56 PM

    ATP Synthase in Mitochondria
    The major component that produced during the photosynthesis is Glucose which is further metabolised by the different metabolic pathways like glycolysis, Krebs cycle, TCA cycle and produces energy whic…

    Read More

  3. Electron Transport System and Oxidative Phosphorylation | ETC |Diagram

    Feb 04, 24 01:57 PM

    Electron Transport Chains
    It is also called ETC. Electron transfer means the process where one electron relocates from one atom to the other atom. Definition of electron transport chain - The biological process where a chains…

    Read More

  4. Tricarboxylic Acid Cycle | Krebs Cycle | Steps | End Products |Diagram

    Jan 28, 24 12:39 PM

    Aerobic Respiration
    This is a type of process which execute in a cyclical form and final common pathway for oxidation of Carbohydrates fat protein through which acetyl coenzyme a or acetyl CoA is completely oxidised to c…

    Read More

  5. Aerobic Respiration | Definition of Aerobic Respiration | Glycolysis

    Dec 15, 23 08:42 AM

    Aerobic Respiration
    This is a type of respiration where molecular free oxygen is used as the final acceptor and it is observed in cell. Site of Aerobic Respiration - Aerobic respiration is observed in most of the eukaryo…

    Read More