Tissues Flashcards
(24 cards)
What is the function and types of fiber in connective tissue?
Functions
Giving the body and organs the strength to resist external forces
Protect internal organs
Allows for movement of muscles
Types of fibers
Collagen fibers- thick strong and resistant to stretch that
Reticular Fibers-thinner and less strong and keep cells in place
Elastic fibers- thinnest can be stretched and can spring back to place
Reticular Connective Tissue
Structure
a branched and mesh-like pattern, due to the arrangement of reticular fibers
Function
Provide Structural Support, framework for blood-forming cells, immune defenses
Locations in the body
Lymph nodes
Bone marrow
Spleen
Adipose Connective Tissue
Structure
mainly composed of round, fat cells called adipocytes
Function
Reservoir for fuel, thermal insulation, and cushioning for organs
Location in the body
under your skin , between your internal organs, and even in the inner cavities of bones
Types of Dense Connective Tissue
Regular
Irregular
Elastic
Regular Dense Connective Tissue
Structure
Collagen fibers that are mostly parallel to each other
Function
Transfer forces to the bones
Locations
Tendons and ligaments
Irregular dense connective tissue
Structure
Composed of collagen fibers that go in different directions
Function
Resisting stretching forces
Location
Skin and joints
Dense Elastic connective tissue
Structure
Made of squiggly elastic fibers that go in the same direction
Function
Resisting to stretching
Location
Found in the airways and large arteries
Cartilage
Found at the end of bones and between bones
Its function is to support flexibility and minimize friction.
Contains Chondroblasts that secrete the extracellular matrix which contains collagen fibers and proteoglycan molecules (made of protein and carbohydrates). These molecules bind to water molecules which allows cartilage to be resistant to compression
Types of Cartilage
Hyaline Cartilage
Elastic Cartilage
Fibrocartilage
Hyaline Cartilage
Structure
a pearl-gray semi translucent matrix (The smooth, shiny substance at the end of turkey bones)
Location
Ends of long bone and ribs
Elastic Cartilage
Structure
Contains more fibers and many chondroblasts
Function
External ear and epiglottis
Fibrocartilage
Structure
Contains more collagen fibers than the other types of cartilage and less chondroblasts
Function
Stronger than the other types of cartilage
Locations in the body
Disc between vertebrae and in the discs of the knee joint
Bone
Structure
Made of osteocytes which secrete the extracellular matrix of bone that contains collagen fibers and calcium salts.
Function
Support and protect the other tissues
Calcium and phosphate storage
House bone marrow
Spongy Bone
Structure
Contains small plates and bars of bone called trabeculae with cavities for bone marrow
Function
helps to lessen the weight of a bone while still providing strength
House bone marrow
Location
At the end of long bone
Compact bone
Structure
Has a central canal called the osteonic canal with a ring formation around it called lamellae
Function
Provides protection and strength
Location
Outer layer of bone, particularly around the shaft
Epithelial Tissue
Structure
squamous, cuboidal, or columnar in shape and may be arranged in single or multiple layers
Functions
Covers the body and lines cavities and glands within the body
Protect the body from physical damage, control what substances enter and leave the body
Provide sensory information
Secrete various substances
Simple Squamous
Structure
A single layer of flattened cells
Function
Allows for rapid diffusion due to thinness
Examples in the body
Gas exchanging cavity of the lungs
The lining of the abdominal cavity
Lines blood vessels and inside of the heart
Simple Cuboidal
Structure
Single layer of cubed cells
Function
Secretion and absorption
Examples in the body
Surround tubules in the kidneys
Found in various Secretory Glands
Simple Columnar
Structure
Single Layer of column cells
Function
Have secretory and absorption function
Examples in the body
Lining of ducts in kidneys
Stomach and intestines
Muscle Tissue
Function
To allow our body to move
Structure
Skeletal and cardiac tissue are striated and smooth is uniform
Location
Bones, heart, and organs
Types
Cardiac
Smooth
Skeletal
Skeletal muscle
Structure
long , thin cells
Have multiple Nuclei
Striations
Function
Pulls on bone to make us move
Location
Attached to bones
Cardiac Muscle
Structure
Shorter cells
Has noticeable divisions/connections between cells which are called intercalated discs
Striated
Function
Generated ATP to continuously make the heart pump
Location
Heart
Smooth Muscle
Structure
long -thin filaments that are not striated
Function
Help with digestion and nutrient collection
Location
Found in hollow organs ex: blood vessels and gastrointestinal tract
Nerve tissue
Structure
Looks like a star and contains dendrites, cell body, and axon
Function
Convey information by electrical signaling
Location
Brain and spinal cord
Histology & Tissues
Histology- The study of animal tissues on a microscopic level
Tissues- A group of cells that all perform the same specific function
