CLASS X BIOLOGY

  Transportation Transportation in human beings - Components of Circulatory system: a)Heart            b) Blood vessels       c) Blood §    Heart -    (Refer to figure 6.10 page no. 106 of N.C.E.R.T  Text book)       (i) It is a muscular organ, which works as a pump in the circulatory system.                        (ii)  It is the size of our fist.                        (iii)  It has two sides, which are separated by a partition so that the oxygenated and                               deoxygenated blood do not get mixed up.                        (iv)  It has four chambers-         Two upper chambers called Atria.          Two lower chambers called Ventricles.     Atria                                                                   Ventricle                                a) Small in size (volume)                                       a) Large in size                                b) Have thin walls.                                                b)

v    Respiration - The process by which digested food is broken down with the help of Oxygen to release energy.   Types of  respiration - (i) Aerobic respiration  (ii) Anaerobic respiration         Aerobic respiration             Anaerobic respiration  1.  Takes place in presence of Oxygen. 2.  End products- Carbon dioxide & Water 3. More energy is released. 4.  Takes place in Cytoplasm & Mitochondria 5. Complete oxidation of glucose takes place. 6. It occurs in most organisms. 7.  Equation- Glucose→ Pyruvate→ CO 2   +  H 2 O + Energy 1.  Takes place in absence of Oxygen. 2. End products- Ethanol & Carbon dioxide or                            Lactic Acid. 3. Less energy is released. 4.  Takes place only in Cytoplasm. 5. Incomplete oxidation of glucose takes place. 6.  It occurs in certain bacteria, yeast & certain tissues of higher organisms. E.g. In humans during vigorous exercise, when the demand for Oxygen is more than the sup

Notes of Chapter- Life Processes ( Nutrition) KEY CONCEPTS & GIST  v    Life processes  – The processes that are necessary for an organism to stay alive. Eg. Nutrition, respiration,circulation, excretion etc. v    Criteria of life - (i) Movement   ii) Growth iii) Life Processes. v    Nutrition - The process in which an organism takes in food, utilizes it to get energy and nutrients for growth, repair and maintenance, etc.  v    Types of nutrition                                                                           1.         Autotrophic nutrition  (Auto =self:  trophos = nourishment) E.g. Plants, Algae, blue green bacteria. o     Process – Photosynthesis (Photo=light; Synthesis= to combine) o     Raw materials- (i) Carbon dioxide (ii)Water o     Equation-                   sunlight                                                                           o      6CO 2   +  6H 2 O                                     C 6 H 12 O 6       +     6O

Welcome to class Xth.....  Your Biology syllabus for the year is as follows: 1. Chapter Life Processes                                 2. Chapter Control and coordination                                                                             3. Chapter Reproduction 4. Chapter Heredity and evolution                                                                                 5. Chapter Our Environment 6. Chapter Management of Natural Resources                                                               (First 4 chapters are for 23 marks and remaining two chapters along with Sources of Energy for 7 marks )                                                                                                                           Practicals: 1. Prepare temporary mount of leaf peel to show stomata. 2. To show experimentally that carbon dioxide is given out during respiration. 3.Study Binary Fission in Amoeba and budding In Yeast with the help of slides 4. Study the st