The Cell Theory

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All living things are made of cells. Cells are the units of structure and function in organisms. All cells come from preexisting cells.

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All living things are made of cells. Cells are the units of structure and function in organisms. All cells come from preexisting cells.

Cell Theory

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Robert Brown

discovered the nucleus

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Matthius Schleiden

All plants and plant parts are made of cells

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Theodor Schwann

all animals are made of cells

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Rudolf Virchow

All cells come from other cells

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Robert Hooke

Discovered cells; Named the cell

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Anton van Leeuwenhoek

Invented the microscope; "animacules"

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Prokaryotes

Cells that do not contain nuclei

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Eukaryotes

Cells that contain nuclei

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cell membrane

thin, flexible barrier around a cell; regulates what enters and leaves the cell

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Phospholipid Bilayer

Plasma membrane layers are composed of phospholipid molecules arranged with polar heads facing the outside and nonpolar tails facing the inside.

<p>Plasma membrane layers are composed of phospholipid molecules arranged with polar heads facing the outside and nonpolar tails facing the inside.</p>
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lipid bilayer

double-layered sheet that forms the core of nearly all cell membranes

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Cytoplasm

The material between the nucleus and cell membrane. Contains organelles that is responsible for the function of the cell

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Nucleus

Control center of the cell; Not all cells have these

<p>Control center of the cell; Not all cells have these</p>
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Chromosomes

contain genetic info.

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Nucleolus

made of RNA and proteins; where the ribosomes are made

<p>made of RNA and proteins; where the ribosomes are made</p>
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Nuclear Envelope

2 membranes that surround the nucleus, has pores

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Mitochondria

Powerhouse of the cell

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Golgi complex

Organelle that packages and distributes proteins

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Ribosomes

Makes proteins (protein synthesis)

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Smooth Endoplasmic Reticulum

  • No ribosomes

  • Buildsmembrane lipids

  • Produces proteins with detoxifying tasks

  • Almost like a maintenance department

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Rough Endoplasmic Reticulum

System of internal membranes within the cytoplasm. Membranes are rough due to the presence of ribosomes. functions in transport of substances such as proteins within the cytoplasm

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cell wall

strong, supporting layer around the cell membrane in some cells

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Chloroplast

Site of photosynthesis

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central vacuole

Sac in a plant cell that contains water and materials soluble in water

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Lysosome

An organelle containing digestive enzymes

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Chromatin

Clusters of DNA, RNA, and proteins in the nucleus of a cell

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<p>centriole</p>
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<p>centriole</p>

centriole

one of a pair of small cylindrical cell organelles near the nucleus in animal cells; Organelle in animal cells, made of microtubules that assists in cell reproduction

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