Tissues

• Level of cell organisation:

  Cells - Building blocks, specialised functions

  Tissue - Group of specialised cells

  Organ - Grouped tissues working together

  System - Highest level. Group of organs with common purpose
• Describe what cells are:

  • Human body compromised of 7.5x10¹³ cells
  • Highly organised
  • Every cell contributes to maintaining homeostasis
  • 200 different type of cells in the body
• Describe epithelial tissue:

  • Covering or lining (i.e. skin)
  • Tightly packed cells of various shapes
• Where is epithelial tissue found:

  • Heart
  • Kidneys
  • Intestines
  • Liver
  • Lungs
• Which organs is epithelia tissue inside of:

  • Heart, stomach, intestines
• Describe connective tissue:

  • Provides support and holds the body together
  • Cells NOT tightly packed
  • Separated by matrix
• What is matrix in connective tissue:

  Non-cellular material between connective tissue cells.

  Examples: Cartilage, bone, ligaments, tendons, fat storage tissues
• How does blood relate to tissue:

  Blood can be classified as connective tissue.

  Matrix is in the fluid in which the blood cells are suspended
• Describe muscular tissue:

  • "Muscle fibres" = cells
  • Long and thin
  • Respond to stimuli; contract (shorten)
• What are the three types of muscular tissue:

  1. Skeletal
  2. Involuntary (smooth)
  3. Cardiac
• Describe skeletal muscle:

  • Make up the muscles attached to bone
  • Facilitate skeletal movement
  • Voluntary control; voluntary muscles
  • Characterised by fibres in striped; striated muscle
• Describe involuntary muscle tissue:

  • Cannot move by conscience control; not voluntary
• If involuntary muscle has no striations what is it referred as:

  Smooth muscle or striated muscle
• Where is involuntary muscle found in the body:

  • Stomach
  • Intestines
  • Blood vessels
  • Iris
  • Uterus
• Describe the cardiac muscle:

  • Cannot move by conscience control; not voluntary
  • Makes up the heart
• What is cardiac muscle also known as:

  Heart muscle
• Describe nervous tissue:

  • Specialised nerve cells called neurons
  • Carries nervous impulses and body when stimulated
• Where is nervous tissue found:

  • Brain
  • Spinal cord
  • Nerves
• What is the 4 basic types of tissue:

  1. Connective
  2. Epithelial
  3. Muscle
  4. Nervous
• Name this type of tissue:

  Epithelial tissue

  
• Name these types of tissues (left to right):

  1. Smooth tissue
  2. Cardiac tissue
  3. Skeletal tissue

  
• Name this type of tissue:

  Nervous tissue

  
• Name this type of tissue:

  Connective tissue