Exercise 6 a&p lab

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  • 1. Exercise 6A Classification of Tissues
  • 2. The Tissue • Multicellular organisms made up of tissues. • Tissues are the group of cells that are similar in structure and function. • Study of tissues, Histology, complements a study of gross anatomy and provides the structural basis for a study of organ physiology.
  • 3. The Tissues • Four primary tissue types are: – – – – Epithelial tissue (Epithelium) Connective tissue Nervous tissue Muscular tissue (Muscles)
  • 4. The Organs • Two or many types of primary tissues are grouped together to make organs; heart, lungs, kidneys • Organs perform specific body functions
  • 5. Epithelial Tissue • Epithelium covers external body surface, the organs and lines the cavities inside organs. • Functions- protection, absorption, filtration, excretion, secretion, and sensory reception.
  • 6. Epithelial Tissue • Characteristics: – – – – – Polarity (apical and basal surface) Cellularity and specialized contacts Supported by connective tissue (basement membrane) Avascularity Regeneration
  • 7. Epithelial Tissue Types: LayerShape Flat (squamous) Cube Column (tall) One layer Simple squamous Simple cuboidal Simple columnar Multiple layers Stratified squamous Stratified cuboidal Stratified columnar Other types Transitional epithelium Pseudostratified columnar
  • 8. Connective Tissue • Found in all parts of the body, connects the tissues and organs • Composed of specialized cells embedded within a non-living matrix. • Matrix is combination of protein fibers (collagen, elastin, & reticulin) and ground substance (interstitial fluid, cell adhesion proteins, & proteoglycans) • Functions: structural framework, protection, support, energy storage, immunity
  • 9. Connective Tissue Classification: 1. Connective i. tissue proper Loose connective tissue a. Areolar connective tissue; mucous membranes b. Adipose connective tissue; hypodermis of skin c. Reticular connective tissue; bone marrow ii. Dense connective tissue 2. Supporting Connective Tissue a. Dense regular connective tissue; tondons b. Dense irregular connective tissue; dermis of skin i. a. Hyaline cartilage; trachea, ribs, ends of long bones b. Elastic Cartilage; external ear, epiglottis c. Fibrous cartilage; intervertebral disks, knee joint Cartilage ii. Bone 3. Fluid Connective tissue a. Osseous connective tissue; bones a. Blood ; blood vessels b. Lymph; lymph vessels
  • 10. 1. Loose Connective Tissue a. Areolar connective tissue
  • 11. 1. Loose Connective Tissue b. Adipose connective tissue
  • 12. 1. Loose Connective Tissue c. Reticular connective tissue
  • 13. 2. Dense Connective Tissue a. Dense regular connective tissue
  • 14. 2. Dense Connective Tissue b. Dense irregular connective tissue
  • 15. 1. Cartilage Connective Tissue a. Hyaline cartilage
  • 16. 1. Cartilage Connective Tissue b. Elastic cartilage
  • 17. 1. Cartilage Connective Tissue c. Fibrous cartilage
  • 18. 2. Osseous Connective Tissue a. Bone
  • 19. 3. Fluid connective tissue a. Blood
  • 20. Muscular tissue • Muscle tissue is relatively long slender cells containing contractile protein actin and myosin • Muscle is both excitable and contractile • Function: movement • Types: a. Skeletal b. Smooth c. Cardiac
  • 21. Nervous tissue • Tissues of the nervous system • Composed of two cell population – Nerons – Neuroglial cells • Neurons are functional excitable cells • Glia are supporting cells with variety of functions • Functions: provides integration and communication between body systems on a relatively fast, short time scale.