Tissue Flashcards
What are the four tissue types?
Epithelial, Connective, Nervous, Muscular
Why aren’t there “respiratory tissues” or “digestive tissues”
Those systems and the organs within them are made of combinations of different tissues
What two criteria allow you to classify tissue types?
- Layer (simple or stratified)
- Cell Shape (squamous, cuboidal, columnar)
Simple Squamous Epithelium
Layer: 1
Cell shape: flat
Location: lungs and blood vessels
Function: rapid exchanges of materials
Simple Cuboidal Epithelium
Layers: 1
Cell Shape: cube
Location: kidney tubes and glands
Function: absorption and secretion
Simple Columnar Epithelium
Layers: 1
Cell Shape: tall, rectangular
Location: digestive system and uterus
Function: absorb and secrete
Pseudo-stratified Columnar Epithelium
Layers: 1
Cell Shape: tall and rectangular
Location: trachea and bronchi
Function: secretion, movement of mucus
Stratified squamous epithelium (keratinized edition)
Layers: 2+
Cell Shape: flat
Location: epidermis (skin)
Function: protect and waterproof
Stratified squamous epithelium (non-keratinized edition)
Layers: 2+
Cell Shape: flat
Location: esophagus, vagina, anus
Function: PROTECT
Stratified Cuboidal Epithelium
Layers: 2+
Cell Shape: cube
Location: sweat & salivary glands
Function: release sweat and saliva
Transitional Epithelium
Layers: 2+
Cell Shape: many different
Location: urethra, bladder, ureter
Function: stretch (to hold urine)
Areolar Tissue
Type: Connective
Matrix: loose network of collagen and elastic fibers
Location: beneath epithelium
Function: fills space between other tissues
Reticular Tissue
Matrix: loose network of reticular fibers, scattered cells
Location: organs
Function: forms the network onto which other cells attach
Adipose Tissue
Type: Connective
Matrix: mostly fat-storing adipocytes
Location: subcutaneous tissue
Function: energy storage and insulation
Dense Regular Connective Tissue
Type: Connective
Matrix: uniform, patterned, densely packed parallel collagen fibers
Location: tendons and ligaments
Function: resist force in one direction
Dense Irregular Connective Tissue
Type: Connective
Matrix: densely packed collagen fibers running in random directions
Location: skin
Function: resist force in multiple directions
Elastic Cartilage
Type: Connective
Matrix: visible elastic fibers
Location: ear, epiglotis
Function: flexible, elastic support
Fibrocartilage
Type: Connective
Matrix: parallel bundles of collagen
Cells: chondrocytes inside lacuna
Location: between vertebrae
Function: absorb shocks, resist forces
Hyaline Cartilage
Type: Connective
Cell Type: chondrocytes inside lacunae
Matrix: Clear and glassy, no visible fibers
Location: joints, trachea, ribcage, fetus
Function: eases joint movements, forms growth plates, holds airway open
Compact (Cortical) Bone
Type: Connective
Matrix: calcified porous appaearance
Cell type: osteocytes inside lcunae
Location: generally the outer surface
Function: support and protection
Spongy (Cancellous) Bone
Type: Connective
Matrix: Calcified, porous
Cells: osteocytes in lacunae
Location: inner layer of bones
Function: lightweight support
Blood
Type: Connective
Matrix: fluid called blood plasma
Cells: erythroctyes (red) and leukocytes (white)
Location: heart and blood
Function: transport gasses, nutrients, waste. Defense and clotting
Nervous Tissue
Function: specialized for rapid transportation
Location: Brain, spinal cord, nerves
Cell types: neurons to detect stimuli and transmit information and glials to provide protection, support, and “housekeeping”
Muscle Tissue
Function: contract and exert forces on other tissues
Types: skeletal, cardiac, and smooth
What is similar about nervous and muscular tissue?
Both can be electrically excited
