Alveoli Nephrons Structure (i) Alveoli are tiny sac-like structures present inside the lungs. (i) Nephrons are tubular structures present inside the kidneys. (ii) The walls of the alveoli are one cell thick, and it contains a network of blood capillaries. (ii) Nephrons are made of glomerulus, Bowman’s capsule, and a long tubules. Function (i) The …
Differences between xylem and Phloem Transport of Materials in Xylem Transport of Materials in Phloem Xylem tissue helps in the transport of water and minerals. Phloem tissue helps in the transport of food. Water is transported upwards from roots to all other plant parts including leaves. Food is transported in both upward and downward directions.
Blood circulates twice through the heart in a single cycle thanks to double circulation. The procedure aids in keeping the body\’s temperature consistent by separating oxygenated from deoxygenated blood. The double circulatory system of blood includes Pulmonary circulationSystemic circulation. Pulmonary circulation Deoxygenated blood is pumped from the right ventricle into the lungs, where it is …
Describe the double circulation of blood in human beings. Why is it necessary? Read More »
Haemoglobin is a protein responsible for the transportation of oxygen to the body cells for cellular respiration. The ability of RBCs to carry oxygen can be impacted by a haemoglobin shortage. This resulted in our bodily cells not having enough oxygen. Anaemia is a condition caused by a lack of haemoglobin.
An essential organ of the body is the lung. The passageway within the lungs separates into increasingly smaller tubes that finally come to an end in balloon-like formations known as alveoli.The surface provided by the alveoli allows for the exchange of gases. Typically, a dense network of blood arteries can be found inside the alveoli\’s …
How are the alveoli designed to maximise the exchange of gases? Read More »
Aerobic respiration There is free oxygen present during the process.Aerobic respiration generates CO2, water, and energy.Glycolysis, the first stage of aerobic respiration, occurs in the cytoplasm; mitochondria, the second stage.All higher organisms engage in the process of aerobic respiration.During this procedure, glucose is completely oxidised. Anaerobic respiration The process takes place in the absence of …
(i) The process of photosynthesis provides the autotrophic organism with the energy and carbon needs.(ii) It is described as the procedure through which autotrophs absorb elements from their environment and transform them into forms of stored energy.(iii) This material is consumed in the form of carbon dioxide and water, which when combined with chlorophyll and …
We consume complex food, and in order for it to be absorbed from the alimentary canal, it must be broken down into smaller molecules. Enzymes, which are biological catalysts, are usually used in this procedure. The complex molecule starch is broken down by an enzyme called salivary amylase in the saliva to produce sugar. Saliva …
What is the role of saliva in the digestion of food? Read More »
(i) Carbohydrates, lipids, and proteins are completely digested in the small intestine. For this function, it receives the liver and the pancreas secretions.(ii) For pancreatic enzymes to work on stomach-born food, they must be converted from their naturally acidic state to an alkaline one. This is done with the help of bile juice, which the …
How are fats digested in our bodies? Where does this process take place? Read More »
The breakdown of pyruvate to give carbon dioxide, water and energy take place in mitochondria. Hence, the answer is (b) mitochondria
