1. Structure (and importance) of cell membrane

2. Structure (and function) of organelles

3. Interconnections between cells to maintain structural stability in body tissues.

Key Points:

Anatomy of a typical cell

1. Cell membrane

2. Cytoplasm

membranous organelles

non-membranous organelles

cytosol

What else is also part of the cell membrane ?

Cell membrane (plasma membrane, plasmalemma)

Non-membranous OrganellesNon-membranous Organelles

Cytoskeleton

Microvilli

Cilia, centrioles, flagellum

Ribosomes

CytoskeletonCytoskeleton

4 major components:

1. Microfilaments (mostly actin)

2. Intermediate filaments

3. Thick filaments (composed of myosin subunits)

4. Microtubules (composed of tubulin subunits)

Fu: support & movement of cellular structures & materials

2 centrioles direct formation of mitotic spindle

In 9+0 array

Cilium - CiliaCilium - Cilia

Compare to microvilli and flagellum

In 9+2 array

Ribosomes

60% RNA + 40% ________

workbench for __________

Fixed vs, free ribosomes