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PLTW Human Body Systems 1.2.1
964
Human Body Tissues
Presented by Mrs. Elliott
for PLTW Human Body Systems
What are they?
Groups of Cells
Tissues are groups of cells that make up organs and other body parts
Groups of Cells
These cells are grouped together according to STRUCTURE a...
These cells are grouped together according to STRUCTURE and FUNCTION.
There are FOUR types
Epithelial Tissue
Function
Lines and Protects
Function
Structure
Cells are tightly packed in sheets
Structure
Layers
Can be simple or stratified
Layers
Shape
Can be squamous, cuboidal, or columnar
Shape
Examples
Simple Squamous - found where diffusion needs to take place or there is lots of friction
Simple Cuboidal - found in glands; secretion and absorption
Simple Columnar - found in stomach, respiratory tract; protection, secretion, and absorption
Muscular Tissue
Function
Movement; contraction
Function
Structure
Parallel, bundles of fibers that are excitable
Structure
Examples
Cardiac - found only in the heart
Smooth - found lining internal organs
Skeletal - attached to bones
Nervous Tissue
Function
Transmits electrical signals
Function
Structure
Cells are specialized to transmit electrical impulses. They have dendrites and axons that allow them to do this.
Structure
Examples
Neurons - signal sending cells
Neuroglia - support cells
Examples
Connective Tissue
Functions
makes up a connective web inside our body
holds body parts together and protects
Structure
fills in the spaces inside our body with a matrix made of fibers within a liquid, solid, or jelly-like substance
Structure
Examples
Bone
Blood
Adipose
Fibrous CT - tendons and ligaments
Loose CT - under skin
Cartilage