1.1 Function → protection, secretion, absorption, excretion Location
→ covers body surface, covers and lines internal organs,
compose glands Characteristics → lack blood vessels, cells
readily divide, cells are tightly packed together.
1.1.1 basement membrane : anchors epithelium to connective tissue.
1.1.2 Basement membrane : anchors epithelium to connective tissue
22.214.171.124 TYPES OF EPITHELIAL CELLS
126.96.36.199.1 Simple Squamous
188.8.131.52.1.1 lines blood vessels and air sacks of the lungs
184.108.40.206.2 Simple Cuboidal
220.127.116.11.3 Simple Columnar
18.104.22.168.4 Stratified squamous
22.214.171.124.5 Stratified cuboidal
126.96.36.199.5.1 lines ducts and glands.
188.8.131.52.6 Stratified columnar
1.2 <-epithelial tissue
2.1 Function → bind, support, protection, fill space , store fat, produce blood cells Location → widely
distributed throughout the body Characteristics → Mostly have a good blood supply, cells are farther
apart than epithelial cells, extracellular matrix in between
2.1.1 Major types of cells
184.108.40.206 Fibroblasts :produce collagen and elastic fibers
220.127.116.11 Macrophages are phagocytes (“eat cells”)
18.104.22.168.1 Connective tissue fibers
22.214.171.124.1.1 Collagen fibers have a great tensile strength.
126.96.36.199.1.2 Elastic fibers are composed of elastin and are stretchy.
188.8.131.52.1.2.1 Categories of connective tissues
184.108.40.206.220.127.116.11 Loose Connective Tissue
18.104.22.168.22.214.171.124.1 Areolar → forms thin membranes between organs and binds them together. Found beneath the skin and
surrounds organs Adipose → stores fat, cushions, and insulates. Found beneath the skin; in certain
abdominal membranes; and around the kidneys, heart, and various joints. Reticular → thin branched
reticular fibers. Supports the walls of the liver and spleen.
126.96.36.199.188.8.131.52 Dense Connective Tissue
184.108.40.206.220.127.116.11.1 Dense Regular → strong collagen fibers that bind structures as parts of tendons and ligaments.
Dense Irregular → thicker, randomly distributed collagen fibers and is found in the dermis.
Elastic → elastic fibers that make up hollow internal organs like the lungs and blood vessels.
18.104.22.168.22.214.171.124.1 provides support Consists of fibers and a gel-like substances Lacks a direct blood supply, so it is slow to
heal Found at the ends of various bones; in the ear; in the larynx; and in the pads between the bones of
the spinal column, pelvic girdle, and knees Bone → matrix consists of mineral salts and collagen.
Compact & spongy bones. Heals rapidly Blood → Composed of cells suspended in fluid. Produced in the
tissue of hollow parts of certain bo
126.96.36.199.1.3 Reticular fibers are fine collagen fibers.
188.8.131.52 Mast cells may release heparin and histamine
2.2 connective tissue ->
3.1 Function → movement Location → attached to bones, in the walls of hollow internal organs, heart Characteristics → Able to
contract in response to specific stimuli
4.1 Function → movement Location → attached to bones, in the walls of hollow internal organs, heart
Characteristics → Able to contract in response to specific stimuli
5.1 Function → conduct impulses for coordination, regulation, integration, and sensory reception
Location → brain, spinal cord, nerves Characteristics → cells communicate with each other and
other body parts