What is a tissue?
A group of cells with similar structure and function
Study of tissue
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)
Attached to basement membrane
Without blood vessels, epithelial tissue gets blood from connective tissue
Classification of epithelial tissue
Layers of epithelial tissue
-Simple cuboidal, simple columnar, pseudostratified columnar epithelium (looks like layers)
Transportation ie: respiratory
Protection ie: skin
Absorption ie: stomach, intestine, reproductive
Expands ie: wall of urinary bladder
Trachea will cillia
Secretory ie: glands
Why are endocrine glands ductless?
Because their glands do not have ducts to carry product to a surface
Which tissue is most abundant?
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?
Loose connective tissue
Areolar, adipose, reticular
Types of cartilage tissue
Hyaline, fibrocartilage, elastic
Makes up spinal cord, brain, nerves
Types of nervous tissue cells
Transport signals, do not regenerate
Protects and supports neurons, can regenerate
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
Regeneration: replacing tissue via mitosis
Replacing tissue (injured) with fibrous connective tissue (scar tissue)
Tissue repair process
- Wound 2. Clot and scab 3. Tissue repair begins 4. Scar tissue forms 5. Epithelial tissue multiplies 6. Scab detaches
Filled with fluid
Cover surfaces, line body cavities, surround organs
Cutaneous, mucous (exterior, mouth), serous (not exterior, pleura, pericardium, peritoneum)
Synovial (joints), periosteum (surrounds bone), perichondrium (cover cartialige), meninges (brain and spinal cord), fascia (covers muscle)
Peritoneum, pleura, pericardium
Parietal and visceral