Types of Tissue Flashcards
What is a tissue?
A group of cells with similar structure and function
Study of tissue
Histology
Main 4 types of tissue
Epithelial, connective, nervous, muscular
What is epithelial tissue?
Forms in large, continuous sheet to cover skin
-Covers outer surface
What does epithelial tissue line?
Most inner cavities: Mouth, respiratory tract, reproductive tract (ex)
Functions of epithelial tissue?
Protects (skin), absorption (in digestive system), filtration (kidney), secretion (exo and endo), transportation (respiratory)
Outer surface
Unattached
Inner surface
Attached to basement membrane
Avascular
Without blood vessels, epithelial tissue gets blood from connective tissue
Classification of epithelial tissue
Squamous
Cuboidal
Columnar
Layers of epithelial tissue
Simple epithelium
-Simple cuboidal, simple columnar, pseudostratified columnar epithelium (looks like layers)
Stratified epithelium
-Transitional
Simple squamous
Transportation ie: respiratory
Stratified squamous
Protection ie: skin
Simple columnar
Absorption ie: stomach, intestine, reproductive
Stratified transitional
Expands ie: wall of urinary bladder
Pseudostratified
Trachea will cillia
Cuboidal
Secretory ie: glands
Glandular epithelia
Secretion
Why are endocrine glands ductless?
Because their glands do not have ducts to carry product to a surface
Which tissue is most abundant?
Connective
What are the functions of connective tissue?
Connection (connects tissue), support, protection, fat storage, transportation
Types of connective tissues
Hard (bone), Semihard (cartilage), liquid (blood)
Which tissue is most well vascularized?
Connective tissue
Loose connective tissue
Areolar, adipose, reticular
Types of cartilage tissue
Hyaline, fibrocartilage, elastic
Nervous tissue
Makes up spinal cord, brain, nerves
Types of nervous tissue cells
Neurons, neuroglia
Neurons functions
Transport signals, do not regenerate
Neuroglia functions
Protects and supports neurons, can regenerate
Muscle tissue
Composed of cells (fibers) that contract for movement
Types of muscle tissue
Skeletal, smooth, cardial
Skeletal muscle tissue
Voluntary and stratified
Smooth muscle tissue
Involuntary and nonstratified
Cardial muscle tissue
Involuntary and stratified
Tissue repair
Regeneration: replacing tissue via mitosis
Fibrosis
Replacing tissue (injured) with fibrous connective tissue (scar tissue)
Keloid
Excessive fibrosis
Tissue repair process
- Wound 2. Clot and scab 3. Tissue repair begins 4. Scar tissue forms 5. Epithelial tissue multiplies 6. Scab detaches
Visceral
Filled with fluid
Membranes
Cover surfaces, line body cavities, surround organs
Epithelial membranes
Cutaneous, mucous (exterior, mouth), serous (not exterior, pleura, pericardium, peritoneum)
Connective membranes
Synovial (joints), periosteum (surrounds bone), perichondrium (cover cartialige), meninges (brain and spinal cord), fascia (covers muscle)
Peritoneum, pleura, pericardium
Parietal and visceral