Khady Guiro C2Prism

Body Tissues  A tissue is a group of cells that have similar structure which function together as a unit.  A nonliving material, called the intercellular matrix, fills the spaces between the cells.  There are four main tissue types in the body: epithelial, muscle, connective and nervous.  Each is designed for specific functions.

Example

Connective Tissues

 Found everywhere in the body.  Includes the most abundant and widely distributed tissues.  Functions  Binds body tissues together  Supports the body  Provides protection

 Variations in blood supply  Some tissue types are well vascularized  Some have poor blood supply or are avascular  Extracellular matrix  Non-living material that surrounds living cells Connective Tissue Characteristics

Extracellular Matrix  Two main elements  Ground substance – mostly water along with adhesion proteins and polysaccharide molecules  Fibers  Produced by the cells  Three types  Collagen fibers  Elastic fibers  Reticular fibers (Next class)

Connective Tissue Types  Bone  Composed of:  Bone cells in lacunae (cavities)  Hard matrix of calcium salts  Large numbers of collagen fibers  Used to protect and support the body

Connective Tissue type  Hyaline cartilage  Most common cartilage  Composed of:  Abundant collagen fibers  Rubbery matrix  Entire fetal skeleton is hyaline cartilage

Connective tissue type  Elastic cartilage  Provides elasticity  Example: supports the external ear

Connective tissue types  Fibro-cartilage  Highly compressible  Example: forms cushion-like discs between vertebrae

Connective tissue types  Dense connective tissue  Main matrix element is collagen fibers  Cells are fibroblasts  Examples  Tendon – attach muscle to bone  Ligaments – attach bone to bone

What have we learned?

Multiple Multiple Questions for 10 Points Linking of bone to bone in a skeletal system is accomplished by which of these tissues? A) Epithelial B) Connective C) Muscle D) Nervous

B) Connective Answer

Hard parts of the body would be made of which of these cell/tissue types? A) Blood B) Bone C) Muscle D) Nerves Multiple Multiple Questions for 10 Points

Answer B) Bone

Multiple Multiple Questions for 10 Points The major function of bone is ___. A) covering body surfaces B) movement C) support D) integration of stimulus

Answer C) support