Cells Basic Building Block of Life. Cell Theory 1)Cells are the basic units of structure & function...

15
Cells Basic Building Block of Life

Transcript of Cells Basic Building Block of Life. Cell Theory 1)Cells are the basic units of structure & function...

Cells

Basic Building Block of Life

Cell Theory

1) Cells are the basic units of structure & function in living organisms.

2) All living organisms are composed of 1 or more cells.

a. Schleiden: all plants composed of cellsb. Schwann: all animals composed of cells

3) All cells come from preexisting cells.a. Virchow contributed this.

Prokaryotes• First life form: Archaea & Bacteria• Note cell wall & cytoplasmic membrane• No membrane-bound organelles• DNA in nucleoid• Ribosomes present

• Errors in figure• Flagellum, singular• Cytosol

Different Cell Types

Eukaryotes• Protists, Fungi, Plants, & Animals• Have membrane-bound organelles• Nucleus with nucleolus• Endoplasmic reticulum: rough & smooth• Golgi apparatus• Mitochondrion• Chloroplasts, Chromoplasts, & other plastids• Vacuoles: plants’ 1 central vacuole; animals- many • Vesicles: lysosomes, peroxisomes, glyoxysomes

Characterized Animal Cell

Blood Cell Types & Their Development

Things to know for the Exam

• Cell types• Structure-function relationship• Form follows function.• Size varies greatly.• Organelles specific for animals vs. plants• Function of all organelles.• Plasma membrane structure & function.

Cell membrane: Fluid mosaic model