Chapter 2 Fifth Grade Science Cells to Systems Chapter 2 Fifth Grade Science

Cells and their functions - _________are the basic building blocks of life. -basic unit of structure and function in an organisms - ____________-cannot be seen with the naked eye -________________Single celled (bacteria) - _________________Many cells that are specialized to do certain tasks. Example: muscle and nerve cells perform certain tasks in the body to help us move and feel. Cells Microscopic Unicellular Multicellular

Cell functions Cells must take in __________. Cells must eliminate ___________. Cells must use food for __________and ______ of wounds. Cells sense and _____________ to changes in their surroundings. Cells work together with other cells for a __________________life function. food wastes growth repair respond specialized

Cells Need Energy Cells get energy through the process of _______________. Cell Respiration is the taking in of _________ and ____________ in order to get energy. Cells need energy for: ____________ _____________________ Cell Respiration food oxygen growth moving Dividing to make new cells

Organelles _______________are structures that perform specific functions within a cell. Organelles in an animal cell: __________-”control center” of the cell, Directs the cells activities, Contains the cells operating instructions, Stores information that will be passed along to new cells. Organelles Nucleus

Inside the Nucleus __________________-Contain DNA -carry the instructions for the cell to do its job -chromosomes control how the whole body grows and changes -DNA carries genetic information ____________-process of passing genes from one generation to the next Chromosomes Heredity

Organelles in an animal cell continued ____________- “Powerhouse of the cell” 8convert the chemical energy from food into a form that the cell can use _____________-surrounds the cell and maintains the internal environment of the cell by allowing food to enter and wastes to exit. _____________Contains fluid, Surrounded by a membrane, Store water and nutrients, Help the cell digest food Mitochondria Cell Membrane Vacuole

Organelles in an animal cell continued ______________fluid substance containing the organelles. All the material of the cell between the cell membrane and cell wall. - Different kinds of cells have different organelles. Example: Muscle cells have several ________________because muscle cells need a lot of energy for movement. Skin cells have very few mitochondria. Cytoplasm Mitochondria

Organelles in Plant Cells ______________-rigid wall outside of the cell membrane that provides support (animal cells do not have a cell wall!) ______________-plant cells have one large vacuole. (animal cells have several smaller vacuoles!) ______________-contain chlorophyll which is used for photosynthesis (Animal cells do not have chloroplasts or chlorophyll because they do not make their own food.) Cell wall Vacuole Chloroplast

How do cells work together?