Anatomy

• "chain like fence" single layer flat cells
• Function: diffusion
• Location: inner lining of circulatory system and small sacs of the lungs (aveoli)

• single layer cube shaped cells.
• Function: SECRETION and absorption.
• Location: glands of the body (e.g. ovaries, salivary glands, pancreas).

• Single layer column shaped cells. 
• Function: secretion and ABSORPTION. Bringing molecules into cells.
• Location: Digestive tract (stomach --->anal canal).

• pseudo= false (fake)
• structure: single layer of cells of varying heights.
• Function: secretion (of mucus)
• Location:Upper respiratory tract

• Cover the body surface.
• As covering and lining tissue.
• Always found as a surface tissue.

• Between organs and tissues.
• Connect.
• Few cells with lots of extracellular material.
• 4 Types: Blood, bone, cartilage and general connective tissue.

• Highly specialized to contract (shorten) and generate force.
• Contract.
• Skeletal muscles of the body and many body organs. 
• Heart and other internal organs.
• 3 types: skeletal, smooth, cardiac

• transmission of electrical signals, which relay information from one part of the body to another.
• Conduct.
• Specialized for conduction of electrical signals.
• Brain, spinal cord, and nerves.

Always Avascular

"squashed" flat cells

cube shaped cells

Column shaped cells

one cell layer

multiple cell layers

• skin "brick wall"
• Multiple layers of flat cells (squashed cells)
• Functions: protection against abrasion
• Location: outer layer of the skin, mouth -->esophagus

Structure: Multiple layers of column-shaped cell

• Structure: "transitions" between being 6 <-->3 cell layers thick
• Function: designed to stretch
• Location: Urinary bladder

are vascular

Blood, Bone, Cartilage, General connective tissues

• is made up of 2 basic building blocks: cells and ECM (extracellular matrix)
• All connective tissues have a lower % of cells than ECM (less cells more ECM)
• Many connective tissues have a rich nerve and blood supply.  (cartilage is an exception; its avascular and lacks nerves).

• connective tissue proper
• adipose tissue
• reticular tissue

Firm to rubbery connective tissue

Hard connective tissue

Fluid connective tissue

stationary cells of CT proper

stem cells

Produce fibers either collagen or elastic fibers

store lipid (energy reserves)

water

gives great tensile strength

Elastic-able to readily stretch and recoil

5 types: Loose connective tissue, dense irregular, dense regular, elastic, adipose

collagenous connective tissue

• Structure: small amount of collagen (even less elastin)
• Distribution: attaches epithelium, surrounds vessels, neurons, muscle fibers
• Function: creates space for passage of vessels and nerves.

• most important. Everywhere in body.
• structure: LOTS of collagen in many directions (packed within tissue)
• Distribution: Dermis, sclera (outer layer of eye)
• wrappings
• Function: strength in ALL directions.

• Structure: LOTS of collagen in one direction
• Distribution: Tendons and ligaments
• Function: Strength in ONE direction.

• Structure: LOTS of Elastin
• Distribution: Found in skin, lungs, arteries, veins
• Function: Can stretch and recoil

• Structure: LOTS of adipose cells
• Distribution: Beneath skin, around organs, in bone morrow.
• Function: Energy storage, insulation, cushion and protect.