Cells Animal & Plant

Cells A cell must: Breathe Nourish itself Repair itself Reproduce Eliminate waste

Cells The internal structures of a cell are called organelles

Organelles of a plant cell (p.278) Main parts Cell membrane: (protects cell) Cytoplasm: (allow flows, keeps organelles in place) Nucleus: (centre of cell, contains chromosomes) Vacuole: (stores nutrients & waste) Endoplasmic reticulum: (cellular transportation) Mitochondrion: (produces energy, cell respiration) Cell wall: (support for cell) Chloroplast: (for photosynthesis, absorbs sunlight)

Organelles of an animal cell Main parts Cell membrane Cytoplasm Nucleus Vacuole Endoplasmic reticulum Mitochondrion

How cells work Inputs : the things that enter the cell to make it work (i.e. Water, nutrients, oxygen) Outputs: Once the cell has used up its inputs it must remove the waste (outputs)

Exchange between cells and their environment The cell membrane makes sure only the correct inputs enter the cell The substances that enter the cell move in and out via diffusion

Diffusion Diffusion is when particles swift from a region where they are very concentrated to a region where they are less concentrated

Osmosis Water enters the cell via osmosis The passage of water across a membrane that only allows certain substance to pass Basically it prevents high concentration of solutes to enter the cell

The vital functions of the cell Plant cells Photosynthesis : Take in carbon dioxide, water, solar energy (inputs) Let out oxygen and carbohydrates (outputs) Animal cells: Cellular respiration: oxygen, carbs (inputs) carbon dioxide, water, energy (outputs)

IN CLASS WORK P. 289 #1 to 4