1. September 2017 Objective: Journal:
Compare and contrast types of tissues
Identify types of tissues
Journal:
Can an organ be made of only one type of tissue? Explain your answer.

2. Cells

3. Important Organelles Cytoplasm Nucleus Cell Wall Mitochondria
Cell Membrane

4. Tissues

5. FOUR MAIN TYPES OF TISSUES
1. Epithelial - covers/lines body 2. Connective - most abundant - connects body part 3. Muscle - responsible for movement 4. Nervous - responsible for sending quick messages

6. Epithelial Tissue Packed closely together
Little or no intracellular material
Form continuous sheets, contain no blood vessels

7. Shape of Cells Squamous – flat and scalelike Cuboidal – cube shaped
Columnar – higher than they are wide

8. Arrangement of Cells Simple – single layer of cells of the same shape
Stratified – many layers of cells of the same shape
Transitional – several layers of cells of different shape

9. Simple Squamous FORM: Thin, scale-like, irregular shape FUNCTION:
Absorption
Ex: Oxygen absorbed into blood from lungs

10. Simple Columnar FORM: Single layer of cells that are higher than wide
FUNCTION:
Absorption
Make up lining of stomach, intestines, some of respiratory and reproductive tract

11. Simple Cuboidal FORM: FUNCTION:
Single layer of cube shaped cells
FUNCTION:
Allow for secretions
Ex: saliva, digestive juices, sweat, hormones

12. Stratified Squamous FORM:
Several layers of closely packed, scale-like cells
FUNCTION:
Protection
Ex: SKIN - protects against microorganisms

13. Stratified Transitional
FORM:
Layers of cuboidal and squamous
FUNCTION:
Ability to stretch, withstand stress
Ex: Found in wall of urinary bladder

14. Pseudo-Stratified FORM: About 2 layers thick Have cilia to move mucous
FUNCTION:
Protects lungs against dust, etc
Ex: Lining of trachea

15. Connective Tissue Most abundant and widely distributed
Many different forms
Found in skin, membranes, muscles, bones, nerves, and all internal organs

16. Areolar FORM: FUNCTION: Most widely distributed
Delicate webs of fibers and cells
FUNCTION:
“glue” that gives the form to internal organs
Provides strength, elasticity and support
Most widely distributed
Found around blood vessels, nerves, organs; in mucus membrane; subcutaneous layer

17. Adipose Found around organs, in yellow marrow, FORM: FUNCTION:
Large storage cells
FUNCTION:
Stores lipids
Found around organs, in yellow marrow,

18. Dense Fibrous FORM: FUNCTION: Makes up tendons, ligaments, scar tissue
Bundles of strong, white collagen fibers in parallel rows
FUNCTION:
Flexible and strong connections
Makes up tendons, ligaments, scar tissue

19. Bone FORM: FUNCTION: Matrix is hard and calcified
Made up of osteocytes
FUNCTION:
Support, protection, storage for calcium

20. Cartilage Form Function:
Area between cells is gel-like with white collagen and elastin fibers in it
Function:
Cushioning between bones
Support surrounding structures and provide shape

21. Blood Form: Function: Blood cells suspended in a liquid matrix
Transport
Protection and Immune Functions

22. Muscle Tissue 3 Kinds: Movement specialists of body
Skeletal, cardiac, smooth
Movement specialists of body
Ability to shorten or contract
Slow to heal
If injured – usually replaced by scar tissue

23. Skeletal Muscle Also known as striated or voluntary FORM: FUNCTION:
Individual cells known as FIBERS
Long and threadlike
Contain many nuclei per cell
FUNCTION:
Control body movements and
move bones
Attached to bones

24. Cardiac FORM: Branched, lightly striated, irregular shaped fibers
FUNCTION:
Regular, involuntary contractions of heart to pump blood
FOUND: the heart muscle

25. Smooth Muscle Also known as involuntary FORM: FUNCTION:
Long, narrow fibers
No cross striations
Only one nucleus per fiber
FUNCTION:
Contraction of digestive tract, bronchioles in lungs; changes diameter of blood vessels, pupils, shape of lenses

26. Nervous Tissue FORM (2 kinds): FUNCTION:
Neurons – nerve cells
Glial cells – connecting and supporting cells
FUNCTION:
Rapid communication and control of body structures
Makes up brain, spinal cord and nerves