1. TISSUES!
Tissues – group of cells that carry out specialized activities
Histology = study of tissues
Pathologists – Study diseased tissue

2. Tissues tissue similar cells working together organ
similar tissues that form one structure that works together

3. 4 large groups of tissue types:
epithelial
connective
muscular
nervous

4. Four Main Types Epithelial Connective Muscle Nervous
Body surface, hollow organs, glands
Connective
Binds organs together; energy reserves
Muscle
Movement and force
Nervous
Stimulates nerve impulses

5. Protection, Filtration, Secretion, Absorption, and Excretion
Epithelial
Tissue
Functions:
Protection, Filtration, Secretion, Absorption, and Excretion
Divisions:
Coverings and Linings
2.Glands

6. EPITHELIAL Covers outer body Lines hollow organs & body cavities
Covers glands

7. Shape & Layers of epithelial

8. Examples (Draw these!)

9. SIMPLE
EPITHELIUM

10. Simple Squamous
Function: Filtration, diffusion, osmosis, and secretion in serous membranes
Location: Kidneys Glomeruli (water, glucose, and wastes), Air Sac of Lungs (Gas Exchange), Heart and Blood Vessels (Nutrients & Medicine)

11. Simple Cuboidal Function: Secretion and Absorption
Location: Kidney Tubules (Wastes), Ovary Surface (Ova)

12. Ciliated Simple Columnar
Function: Moves fluids and particles along passageways
Location: Found in respiratory tract (mucosal Movement), fallopian tubes (Ova movement), sinuses (Pathogen removal Runny Nose)
Cilia

13. Binds organs together, energy reserves for fat
Connective
Tissue
Binds organs together, energy reserves for fat

14. CONNECTIVE most abundant wide spaces between cells filled with matrix
matrix can be liquid, semi-solid, or solid
matrix contains elastic fibers & collagen

15. Connective Tissue

16. 8 types of connective tissue:
areolar (loose)-
packing material; surrounds organs to prevent them from moving around
adipose (loose)
stores FAT; insulation; energy; cushion 

17. Areolar Connective
Fibroblasts
Elastin
Collagen
Provides strength, elasticity, and support to subcutaneous layer and pappilary regions of skin
Consists of Collagen, Elastic, Reticular fibers

18. Adipose Tissue FAT Insulation Nucleus Fat Storage Blood Vessel
Energy Reserves

19. Types of Connective Tissue
fibrous- (dense)
can withstand force
tendons (attach m to b) & ligaments (attach b to b)

20. Dense Regular Tissue
Dense, Closely packed collagen fibers that provide high tensile strength
Strong attachment for Tendons (Muscle to Bone), Ligaments (Bone to Bone)

21. Types of Connective Tissue
elastic-
joins together 33 vertebrae to keep spine aligned

22. Elastic Tissue

23. Types of Connective Tissue
cartilage-
aka “gristle”
covers ends of bones; shock absorbers; nose, ears, trachea, spine

24. Cartilage White Fibrocartilage Extremely tough
Acts as a shock absorber, ball and socket joints
Elastic Cartilage
Abundance of elastin for stretching capability
Nose, Ears, epiglottis, larynx

25. Types of Connective Tissue
bone-
“osseous tissue”; hard matrix
blood-
the only liquid tissue; 3 types of cells in liquid plasma

26. Provides for support, Movement-Marrow (blood-forming)
BONE
Calcium
Haversian Canal
Compact vs. Spongy
Provides for support, Movement-Marrow (blood-forming)

27. Blood ALWAYS Red!!!!! Clotting (platelets) Immunity (WBC’s)
Oxygen Transport
Clotting (platelets)
Immunity (WBC’s)
Nutrient delivery
ALWAYS Red!!!!!

28. Types of Connective Tissue
reticular-
scattered through body
phagocytic (ingest bacteria/viruses)

29. Muscle Tissue
Movement and force application

30. MUSCULAR = shortening & thicken to cause movement
*purpose: contraction
= shortening & thicken to cause movement
work in antagonistic pairs (opposite)
Biceps flexes arm
Triceps extends arm

32. Skeletal Muscle Tissue
Attached to bones by tendons
Functions in body movements, posture, thermogenesis
Only Muscle tissue controlled voluntarily

33. Smooth Muscle Tissue
Forms walls of many internal organs ie: Stomach, GI tract, Uterus, Anus
Functions in motion of internal organs

34. Cardiac Muscle Composes the heart wall
Functions in pumping blood to all parts of the body
Intercalated discs contain Gap Junctions (Communication) & Desmosomes (Anchor)

35. NERVOUS in brain, spinal cord, & nerves nerve cells = “neurons”
respond to stimulus by transmitting electrical impulses

36. Nervous Tissue Axon Dendrite Nucleus Consists of Neuron and Neuroglia
Neuron – Conversion from stimulus response to action potential (Sensory, Motor, Interneuron)
Dendrites – Reacts to stimuli
Axons – Conductor of impulse
Axon
Dendrite
Nucleus
Nervous Tissue

37. The End!
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