Casket of life #plant#animals#cells#types

Diversity of life,cells

1. Casket of life BY DR.SREEREMYA DIRECT LEARNING

2. Minnu was walking along the beautiful garden in front of her house, humming a tune. At once something pricked her. It’s so painful! She was surprised when she saw a little black insect on her hand. How tiny the creature is!!!! INTRODUCTION

3. Even smaller than an ant! There are so many kinds of plants and animals around us! Big, small, of different colours, shapes and so on. Casket of life . Word Meaning- A casket is a coffin, or a box in which the body of a dead person is buried

4. Casket of life

5. Shall we use a hand lens to see these minute organisms? Hand lens cannot be used to see organisms smaller than ant Microscope is used to see all microorganisms, thin slices of plant and animal cells

6. Materials required: Microscope, slide, cover glass, hay-soaked water. Take a drop of hay-soaked water on a slide. Place the cover glass and then observe it through the microscope. MICROSCOPRE:TO VIEW

7. The following things may be adopted: • collect water in which hay has decayed from harvested fields. • collect the remaining water from canals, pond etc., which have started drying up. • take a handful of hay. Cut it into pieces and boil it in water. Drain the water and cool it. Mix this water with a spoonful of water collected from a stagnated water bed. Observe it after three days. WHILE COLLECTING WATER SAMPLES

8. MICROORGANISMS MICROSCOPIC VIEW-AMOEBA EUGLENA

9. MICROORGANISMS PARAMECIUM

10. Physiology is the study of animal (including human) function and can be investigated at the level of cells, tissues, organ systems and the whole body. The underlying goal is to explain the fundamental mechanisms that operate in a living organism and how they interact . Physiological activities take place in microorganisms too. BASIS OF LIFE

11. Tiny units of the body The body is made up of many small units. Even the body of the tiny ant is made up of thousands of such small units. These small units of the body are called cells . There are organisms with only one cell. They are unicellular organisms. Amoeba, paramecium, euglena, bacteria etc., are unicellular organisms. Organisms with more than one cell in their body are multicellular organisms. Animals and plants are multicellular organisms. MICROORGANISMS BACTERIA

12. A unicellular organism, also known as a single-celled organism, is an organism that consists of a single cell, unlike a multicellular organism that consists of multiple cells. Organisms fall into two general categories: prokaryotic organisms( Eg -Bacteria) and eukaryotic organisms( Eg -Humans, Plants) UNICELLULAR ORGANISMS

13. DO CELLS GROW WITH AGE? CHEEK CELLS AFTER STAINING MICROSCOPIC VIEW Method of collecting cheek cells Wash the mouth thoroughly with clean water. Scrape the internal surface of the cheek using a new toothbrush. Place the cheek scrap in the drop of water on the slide. Spread this and add a drop of stain. Cover it with the cover glass and observe the slide through the microscope. All cells experience changes with aging. They become larger and are less able to divide and multiply. 

14. It is said that there are millions of cells in the human body. If so, how large would be the number of cells in the body of an elephant ! An average person is estimated to contain roughly 30 trillion human cells, according to recent research.  CASKET OF LIFE

15. CELLS ARE IN DIFFERENT SHAPES, SIZE, FUNCTIONS Different types of cells

16. Different types of cells

17. Different types of BLOOD cells

18. There are different types of cells like these in multicellular organisms . DIFFERENT TYPES OF CELLS

19. ANIMAL CELL. Explain parts(Take reference of previous diagrams) WBC CHEEK CELLS

20. Now we have learnt about different kinds of cells. There are certain common components in all cells Inside the cell

21. Nucleus, cytoplasm, cell membrane etc., are some of the important parts of a cell. Nucleus is the centre of the cell. Cell membrane is the covering of the cell. The matrix filled inside the cell membrane is the cytoplasm. ANIMAL CELL

22. Cell organelles

23. EXPERIMENT Observe the onion peel through a microscope. Remove the dry outer layers of onion. Remove the dry outer layers of onion. Then peel off the thin layer from the fleshy part. Keep this in water in a watch glass. After staining ( saffranin ) it, place a small portion on a slide by using a brush. Cover it with cover glass. Plant body

24. CELLS ARE OF DIFFERENT SHAPES,SIZE, FUNCTION IN PLANT BODY Diversity in plant cells too

25. Diversity in plant cells too

26. PALNT CELL &ANIMAL CELL

27. FROM THIN SLICE OF TENDER STEM-MICROSCOPIC VIEW

28. Cell morphology in animal tissues is diverse, enormously diverse! It can vary from rounded to star-like, from multi-lobed to filiform . Plant cells also show a wide diversity of forms, which is determined by the cell wall, with cuboidal and columnar being the most common shapes. DIVESITY OF CELLS