### animal tissue | arachnoid:

Pseudoscorpion
* Many pseudoscorpions live among leaf litter on the forest floor.
* have a typical arachnid reproductive pattern
  - huge pinchers but no stinger
* use their pinchers to catch prey.

Whip scorpion
* Most whip scorpions live in habitats
  - various habitats
  - occur in habitats
* Some whip scorpions possess glands.
* is an arachnoid
* make excellent pets.

### animal tissue:

Epithelial tissue
* All Epithelial tissue is composed of a sheet of cells one or more layers thick.
* All epithelial tissues lack blood vessels
  - rest on a basement membrane
* Most epithelial tissue covers organs.
* Some epithelial tissue is specialised to form glands like oil and sweat glands in the skin
  - tissues are sensory and others are reproductive in function
* are boundary tissues which cover surfaces of organs and the body
  - capable of forming ducts and branching c
  - thought to be unique to animals
* consists of cells arranged in continuous sheets, in single or multiple layers.
* contain no blood vessels.
* cover all external body surfaces and line all internal spaces and cavities
  - surface, line cavities and tubes, and can form glands
* covers body surfaces and lines body cavities
  - or lines parte of the body
* form linings and coverings.
* have many tight junctions.
* helps to protect organs from microorganisms, injury, and fluid loss.
* is animal tissue
  - basically skin tissue, covering and lining the body both inside and out
  - categorized according to the number of layers, cell shape and apical surface
  - composed almost entirely of tightly packed cells
  - made up of cells that only line outer body surfaces
  - named by a. the shape of the most superficial layer of cells
* is the covering, lining, and glandular tissue of the body
  - only tissue type that has polarity, that is, an apical and basal surface
* provide several functions within the body.
* provides a covering.
* secretes substances
  - such substances

### animal tissue | epithelial tissue:

Endothelium
* is the inner layer of cells on the inside surface of the cornea.
* provides a smooth lining to facilitate flow and prevent clotting.

Fatty tissue
* Most fatty tissue holds nutrients.
* Some fatty tissue replaces muscle tissue
* Some fatty tissue supports internal organs
  - surrounds kidneys
* burns very few calories.
  - connective tissue
  - deposited within the breast as well
  - extremely fragile and is easily killed
  - fragile and tends to die off when moved from one place in the body to another
  - specific to the amount of fat contained in adipose tissue throughout the body
  - usually present in the hernia

Fibrous tissue
* Most fibrous tissue covers bones
  - spongy bones
* Some fibrous tissue covers surfaces
  - surrounds testes
* connect the normally unattached outer surface of the lung to the inner chest wall.
* connects bones
  - structures
* is animal tissue
  - dispersed between large numbers of giant cells and histiocytes
  - less elastic
  - non-functioning material made up of tiny scars
  - plant tissue
  - present in the joint capsule, ligaments and tendinous insertions of muscles

Glia
* constitute a support system for neurons.
* divide uncontrollably, forming masses called glioblastomas that are difficult to treat.
* provide immuni serveillance and aid in tissue repair.
* regulate dendritic growth in rat sympathetic neurons via bone morphogenetic proteins.