1. TISSUES
4 Major Types

2. 1. EPITHELIAL TISSUE Linings of organs. 3 Types: SQUAMOUS – thin
CUBOIDAL – “cube” or square shaped
COLUMNAR – rectangular
These 3 may be SIMPLE (one layer) or STRATIFIED (more than one layer).

5. 2. MUSCLE TISSUE 3 Types: SKELETAL CARDIAC SMOOTH Attached to skeleton
Voluntary movement of the body
Striated, un-branched fibers and multinucleated cells
CARDIAC
Makes up the heart, only.
Involuntary movement
Striated, branched fibers and multinucleated cells (sometimes)
SMOOTH
In or surrounding internal organs and blood vessels.
Non-striated, non-branched, and single nucleus in cells

7. MUSCLE TYPE SKELETAL CARDIAC SMOOTH
CONTROL
Voluntary
Involuntary
STRIATIONS
Present
None
NUMBER OF NUCLEI PER FIBER
Many Peripheral
One or Two Peripheral
One Central
BRANCHING
Unbranched
Branched
SPEED OF CONTRACTION
Most Rapid
Intermediate
Slowest

9. Cardiac Muscle

10. Smooth Muscle

11. 3. CONNECTIVE TISSUE
1) Loose (Areolar) Connective –Holds organs in place and attaches epithelial tissue to other underlying tissues. It also surrounds the blood vessels and nerves
Adipose Tissue
A type of loose connective.
Fat storage
Cells are called ADIPOCYTES
2) Dense Connective – Tendons and ligaments

13. 3) Cartilage - CHONDROCYTES (cells) sit in space called LACUNA and secrete a surrounding matrix.
4) Bone – Contains OSTEOCYTES (cells) which form LAMELLAE (rings) surrounding HAVERSIAN CANALS (paths for blood and nerves).
CANALICULI – Extensions of cells to communicate with blood vessels, nerves and each other.
Osteocytes also lie in lacuna.

14. Cartilage

15. Bone

16. 5) Vascular - RBC's, WBC's, and platelets in plasma.
Erythrocytes (RBC’s)- Contain the iron based protein HEMOGLOBIN which carries gases (Oxygen, Carbon Dioxide, Carbon Monoxide)
Hemoglobin also gives the cell its red coloration.
Leukocytes (WBC’s)- Fight infection by engulfing pathogens. Also create antibodies.
Thrombocytes (Platelets)- Involved in blood clotting

17. Blood

18. Blood

19. 4. NERVOUS TISSUE Nerve cells are called NEURONS.
DENDRITES receive impulses, CYTONS are the main cell bodies, and AXONS transmit the impulse along.
NEUROTRANSMITTERS are chemicals that jump across the SYNAPSE from the axon of one neuron to the dendrite of the next, transmitting the message.
Na+ (outside) and K+ (inside) are responsible for the electrical conduction of an impulse.
As the impulse moves down the neuron, the Sodium and Potassium switch places, then return back to their original spots by active transport.

20. Nerve Cells

21. Na/K Pump Animation