Tissue Test Flashcards
What are the four major tissue types?
Epithelial, connective, muscle, nervous
A groups of similar cells with a common function
Tissues
Where are epithelial cells located?
They line things, cover things, and make up glands
What are the functions of epithelial tissue?
Protect, absorb, filter, and secrete
What is special about epithelial cells?
They have a free space and rest on a basement membrane
Are epithelial cells spread out or tightly packed?
Tightly packed together
Do epithelial cells have blood vessels?
No they are avascular
How did epithelial cells get food and oxygen
Diffusion
How are epithelial cells classified?
By shape and arrangement
Arranged in a single layer and good at absorption
Simple
Arranged in many layers and good at protection
Stratified
Cells that are flat or tire shaped
Squamous
Cells that are cubed shaped
Cuboidal
Cells that are elongated
Columnar
Example of simple cells
Capillaries, avioli
Example of stratified cells
Skin
Example of squamous cells
Cheek cells
Single layer of flat cells, with thin nuclei
Simple squamous
Where are simple squamous cells found?
In air sacs, walls of tiny blood vessels
Simple squamous cells are good at
Absorption
Single layer of cube shaped cells
Simple cuboidal epithelial
Where are simple cuboidal cells found?
In kidneys tubules, and glands
Simple cuboidal cells are good at
Absorption and secretion
Single layer of column shaped cells, with nuclei located near the base
Simple columnar epithelial
Where are simple columnar cells found?
In the digestive tract
Simple columnar cells are good at
Absorption and protection
What is special about simple columnar epithelial cells
They have goblet cells
Cells that secrete mucus to lubricate the free space
Goblet cells
False impression of layers, all cells touch the basement membrane but not all cells reach the free space, have cilia and goblet cells
Pseudostratified columnar epithelial
Where are pseudostratified columnar cells found?
In the respiratory tract
What are pseudostratified columnar cells good at
Absorption and secretion
Cells at the free edge see squamous shaped, cells near basement membrane are cuboidal it columnar
Stratified squamous epithelial
Where are stratified squamous cells found?
In the lining or the mouth, throat, and anal cavity as well as the outer portion of the skin
Stratified squamous cells are good for
Protection
Tissue adapted for stretching, cells at free space can change shape
Transitional epithelial
Where are transitional epithelial cells found?
Line urinary organs
If transitional epithelial cells are stretched they are what shape?
Squamous
If transitional epithelial cells aren’t stretched they are what shape?
Cuboidal
Where is connective tissue found?
Everywhere in the body
What is the function of connective tissue?
Protect, support, bund things together, fill spaces, store fat, produce blood cells
What is special about CT cells?
They have an extra cellular matrix
Made by CT cells, vary from fluid to rock hard substances, help tissues bear weight and withstand stretching
Matrix
What fibers are found in the matrix?
Collagen(white and strong)
Elastic fibers(yellow and stretchy)
Recticular(fine fibers)
Delicate and cob-we by, packing tissue and glue, surrounds organs and is found directly beneath skin
Loose CT (Areolar)
Lots of white fibers, found in ligaments and tendons, they are slow too heal because of the poor blood supply, white part of our eyes
Dense CT
Connects bone to bone
Ligament
Connects muscles to bones
Tendons
Cells contains a large vacuole that stores fat, protects by padding organs, acts as an insulator and energy reserve
Adipose CT
Rocklike hardness from the matrix with calcium salts that separate bone cells, supports, protects, and provides framework
Osseous CT
Tough yet flexible, has 3 types
Cartilage CT
What are the three types of CT
Hyaline, fibrocartilage, elastic
Glassy, blue-white, found at ends of bone, tip of nose, tracheal rings, connects ribs to breast bone
Hyaline cartilage
Highly compressible, forms disks between the backbone
Fibrocartilage
Outer ear and part of larynx
Elastic cartilage
Has living cells in a fluid matrix called plasma, cells are RBC, WBC, and platelets
Vascular CT
Specially to contract or shorten to move things, there are 3 types
Muscle tissue
What are the 3 muscle tissues?
Skeletal, cardiac, smooth
Attached to bones, contracts voluntarily, long cylindrical multi-nucleate cells, have a banded appearance
Skeletal muscle
Found only in the heart, contacts and pumps th heart, contracts involuntarily, has stritations, are uninucleate, have intercalated disks
Cardiac muscle
Thick junctions where branching cells fit together
Intercalated disks
Make up organs, line stomach and bladder, no stritations, one nucleus, are spindle shaped and contract involuntarily
Smooth muscle
Make up the brain, spinal cord, and nerves, cells called neurons, conduct electrical impulses, cytoplasm is drawn into long extensions to speed up impulses
Nervous tissue