Tissues and the Integumentary system

• Epithelial tissue is a type of tissue that covers the outside of the body and lines the inside of the body
• Epithelial form the boundaries between different environment/substances
• Basement membrane

  
• Basal surface

  
• Apical surface

  
• Single layer of cells it is called simple
• many layers of cells it is called stratified
• Squamous

  
• Cuboidal

  
• Columnar

  
• Epithelial tissues are avascular meaning they do not have a blood supply
• Connective tissue connects or binds part of the body
• Cells are the living part of connective tissue
• Extracellular matrix is a network of fibers and proteins that surrounds and supports cells
• osteocytes (bone cell) are located in small spaces within the bone matrix
• the centre of each osteon is a central canal containing blood vessels and nerves
• Bone tissues‘s hard give the ability to protect and support body structures
• Cartilage is firm but softer and more flexible
• loose connective tissue forms soft net-like tissues to wrap organs
• Dense connective tissue contains thick, strong collagen (protein) fibre
• Nervouse tissue creates and rapidly transmits electrical signals allow communication within the body
• Neurons are nerve cells that create and transmit electricity
• Glial cells supporting the neurons
• Epidermis - consisting of stratified squamous epithelium
• Dermis - consisting of loose and dense connective tissue
• Nails appear pink because of the rich blood supply in the underlying dermis