1 / 10

Cells, Tissues, Organs and Body Systems

Cells, Tissues, Organs and Body Systems. Notes for Quiz. Characteristics of Living Things. Composed of cells Reproduce Grow Repair themselves Require energy Respond to their environment Die Produce wastes. Microscope Parts: page 356. Microscope Safety.

oralee
Download Presentation

Cells, Tissues, Organs and Body Systems

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. Cells, Tissues, Organs and Body Systems Notes for Quiz

  2. Characteristics of Living Things • Composed of cells • Reproduce • Grow • Repair themselves • Require energy • Respond to their environment • Die • Produce wastes

  3. Microscope Parts: page 356

  4. Microscope Safety • Always carry the microscope by the arm and the base. • Never use the coarse-adjustment knob in high power (you could damage the lens/slide and it should already be in focus). • Always use a dust cover. • Be careful with slide (they are made of glass). • Store with the low-power objective lens in place. • Start with the objective lens as close to the slide as possible and then move up to focus. • Use 2 hands to focus.

  5. Cell Structures: Animals • Nucleus: the control centre • Chromosomes: carry genetic information • Cell Membrane: controls what goes in and out of the cell • Cytoplasm: allows materials to be transported quickly and stored • Vacuole: stores water and nutrients • Flagellum: a whip-like tail that allows some cells to move • Cilia: tiny hairs that can move some cells or the surrounding environment

  6. Cell Structures: Plants Plant cells have all the same structures as animal cells plus: • Vacuole: the vacuole is much larger in plant cells • Cell Wall: supports and protects the plant cell • Chloroplasts: contain chlorophyll and allow the plant cell to make it’s own food SEE DIAGRAMS ON PAGE 20 AND 21

  7. Organelles • Mitochondria: provide cells with energy through respiration • Ribosomes: Proteins (needed for growth, repair and reproduction) are put together on endoplasmic reticulum • Endoplasmic Reticulum: carry materials through the cytoplasm • Golgi Apparatus: stores protein molecules • Lysosomes: Breaks down large molecules and destroys damaged or worn-out cells SEE DIAGRAMS ON PAGE 26 AND 27

  8. Diffusion • Cell membranes are selectively permeable (they allow some things to enter or leave but not others). • Diffusion: the movement of molecules from areas of high concentration to areas of low concentration. • Substances that a cell uses up (nutrients) will be low inside the cell so they will diffuse INTO the cell. • Waste products tend to be more concentrated inside the cell so they will diffuse OUT of the cell.

  9. Osmosis and Turgor Pressure • Osmosis is the diffusion of WATER through a selectively permeable membrane (like the cell membrane) from an area of higher concentration to an area of lower concentration. • Turgor Pressure: Water pressure in a plant cell that pushes the cytoplasm against the non-living cell wall, causing the plant to stay rigid.

  10. HOMEWORK (we will do this in class) • Page 78-80 • # 4, 6, 7, 8, 9, 10, 15, 17, 25a • Due next class • Don’t fret!! They are mostly multiple choice/fill in the blank questions.

More Related