Body Cells and Tissue Flashcards
What are tissues?
A group of cells that are similar in structure and function. For example, muscle tissue
Tissue is organized into: (3)
Heart, lungs, kidneys
Epithelial
Laid on or covering
Epithelium forms _ (1)
Boundaries
- Separates us from the outside world
Examples of Epithelial Cells: Simple squamous epithelium
Found where filtration of substances by RAPID DIFFUSION happens
Examples of Epithelial Cells: Stratified squamous epithelium cells (2)
- Most common STRATIFIED epithelium of the body
- Found at sites that receive a good deal of abuse or friction
- Esophagus
- Mouth
- Outer portion of the skin
Functions of Connective Tissue (2)
- CONNECTS body parts
- Found everywhere in the body, most abundant in body
- Protects, SUPPORTS, and binds together other body tissues
- Well vascularized (good blood supply)
- Subcutaneous tissue (beneath the skin)
Bone (2)
- Called osseous tissue
- Layers of a hard matrix that contains calcium salts in addition to collagen fibers
Cartilage (2)
- Less hard and more FLEXIBLE than bone
- Found in only a few places in the body
Dense Connective Tissue (3)
- Has collagen fibers
- Forms strong, ropelike structures (tendons and ligaments)
- Makes up lower layers of the skin (dermis) where it is arranged
in sheets
Tendons
Attach skeletal muscle to bones
Ligaments
Connect bone to bone at joints
Loose Connective Tissue - Areolar Tissue
Body cells get their nutrients and release their wastes into the tissue fluid
When the body region is inflamed, the alveolar tissue____
in the area soaks up the excess fluid and the area swells and becomes puffy
- Condition is known as EDEMA
Loose Connective Tissue - Adipose Tissue
- Commonly known as fat
- Forms the subcutaneous tissues below the skin
- Insulates the body and protects against extreme heat and cold
Loose Connective Tissue - Blood (vascular tissue)
- Blood is a transport system for the cardiovascular system
Blood carries __ (4)
- Nutrients
- Waste
- Respiratory gases
- Many other substances throughout body
Lacunae
Cavities where the bones sit-in
Loose connective tissue
Alveolar Tissue
Nearly all substances given off or received by the body must pass through
Epithelial
Examples of where Stratified squamous epithelium cells are (3)
- Esophagus
- Mouth
- Outer portion of the skin
Nervous Tissue Characteristics
- Made up of cells called neurons
- Neurons can receive and conduct electrochemical impulses from one part of the body to another
Neurons can receive and conduct ____ impulses from one part of the body to another
Electrochemical
Muscle Tissue Characteristics
- Specialized to contract and shorten to produce movement
- Muscle cells are called muscle fibers because they are elongated to provide a long axis for contraction
