1. Tissues of the Body

2. Four Basic Kinds of Tissues Epithelial Tissue Epithelial Tissue Connective Tissue Connective Tissue Muscle Tissue Muscle Tissue Nervous Tissue Nervous Tissue

3. Epithelial Tissue Epithelial Tissue Locations: Epithelial Tissue Locations: Covers the body Covers the body Lines the cavities, tubes, ducts and blood vessels inside the body Lines the cavities, tubes, ducts and blood vessels inside the body Covers the organs inside body cavities Covers the organs inside body cavities Epithelial Tissue Functions: Epithelial Tissue Functions: Protection from physical & chemical injury, Protection from physical & chemical injury, Protection against microbial invasion, Protection against microbial invasion, Contains receptors which respond to stimuli, Contains receptors which respond to stimuli, Filters, secretes & reabsorbs materials and Filters, secretes & reabsorbs materials and Secretes serous fluids to lubricate structures. Secretes serous fluids to lubricate structures.

4. Connective Tissue Connective Tissue: Connective Tissue: Most abundant & widely distributed tissue Most abundant & widely distributed tissue Connective Tissue Functions: Connective Tissue Functions: Connects, binds and supports structures, Connects, binds and supports structures, Tendons, ligaments, etc. Tendons, ligaments, etc. Protects & cushions organs and tissues, Protects & cushions organs and tissues, Insulates (fat) and Insulates (fat) and Transports substances (blood). Transports substances (blood).

5. Muscle Tissue Muscle Tissue: Muscle Tissue: Associated with the bones of the skeleton, the heart and in the walls of the hollow organs of the body. Associated with the bones of the skeleton, the heart and in the walls of the hollow organs of the body. Muscle Tissue Functions: Muscle Tissue Functions: Movement Movement Locomotion Locomotion Maintains posture Maintains posture Produces heat Produces heat Facial expressions Facial expressions Pumps blood Pumps blood Peristalsis Peristalsis

6. Nervous Tissue Nervous Tissue: Nervous Tissue: Main component of the nervous system, Main component of the nervous system, ie., brain, spinal cord & nerves. Nervous Tissue Functions: Nervous Tissue Functions: Regulates & controls body functions Regulates & controls body functions Generates & transmits nerve impulses Generates & transmits nerve impulses Supports, insulates and protects impulse generating neurons. Supports, insulates and protects impulse generating neurons.

7. Squamous Epithelium Simple – one cell thick Forms solid layer of cells which line blood vessels, body cavities & cover organs in body cavities Forms solid layer of cells which line blood vessels, body cavities & cover organs in body cavities Stratified – multiple layers Stratified – multiple layers Forms epidermis Forms epidermis

8. Cuboidal Epithelium Simple – one cell thick Roughly cube shaped Line ducts in kidneys, etc, where reabsorption and secretory activities take place. Line ducts in kidneys, etc, where reabsorption and secretory activities take place. Duct Cuboid Cells Duct Cuboid Cells

9. Columnar Epithelium Simple – one cell thick Column shaped (long & narrow) Line digestive tract where reabsorption & secretion occurs. Pseudostratified – gives the appearance of more than one layer of columnar epithelial cells Pseudostratified – gives the appearance of more than one layer of columnar epithelial cells

10. Connective - Bone Tree ring-like appearance Supports & protects Supports & protects Mineral storage Mineral storage Fat storage Fat storage Blood cell production Blood cell production

11. Connective – Hyaline Cartilage Supports while providing flexibility Supports while providing flexibility Absorbs compression between bones in joints (articular cartilage) Absorbs compression between bones in joints (articular cartilage) Holds open respiratory passages Holds open respiratory passages Most abundant type of cartilage in body Most abundant type of cartilage in body

12. Muscle - Skeletal Muscle fibers (cells) long, parallel & cylindrical With many nuclei (multinucleate) Striations (cross stripes run perpendicular to the cells Striations (cross stripes run perpendicular to the cells Produce voluntary movement Produce voluntary movement Locomotion Locomotion Heat Heat

13. Specific Nervous Tissue Types Nervous – Neuron Branching cells with many long processes Branching cells with many long processes Large central nucleus Large central nucleus Transmit impulses from one area of the body to other areas Transmit impulses from one area of the body to other areas Regulate activities through neuron impulses Regulate activities through neuron impulses