Epithelial Tissue Flashcards
What are the three shapes of epithelial cells?
Squamous (flat), Cuboidal (boxy), Columnar (tall). 🟦🟧🔳
How are epithelial tissues classified based on layers?
Simple (one layer), Stratified (multiple layers), Pseudostratified (single layer appearing as multiple). 🏗️
What is simple squamous epithelium specialized for, and where is it found?
Rapid diffusion; found in alveoli, kidney tubules, and capillaries. 🌬️🫁
Where can simple cuboidal epithelium be found, and what is its function?
Lining kidney tubules and gland ducts; secretion and absorption. 🧪🩺
What distinguishes simple columnar epithelium, and where is it found?
Tall cells for absorption and secretion; found in the digestive tract and female reproductive tract. 🍎👩⚕️
What is the function of ciliated columnar epithelium, and where is it located?
Moves mucus and particles; found in the respiratory tract and fallopian tubes. 🌬️👃
What is pseudostratified columnar epithelium, and where is it located?
Appears layered but isn’t; found in the respiratory tract with cilia. 🚦🫁
What is the primary function of stratified squamous epithelium?
Protection against abrasion; found in skin (keratinized) and mouth lining (non-keratinized). 🛡️🖐️
Where is transitional epithelium found, and what is its function?
Urinary bladder; allows for stretching and expansion. 💧🏥
What is the difference between endocrine and exocrine glands?
Endocrine glands release hormones into the bloodstream; exocrine glands release secretions through ducts. 🔬🩸
What are the three types of exocrine gland secretion methods?
Merocrine (exocytosis), Apocrine (apical release), Holocrine (cell rupture). 🌊💦💥
Give an example of a merocrine gland.
Eccrine sweat glands, which release sweat via exocytosis. 🏃💧
What type of secretion do sebaceous glands use?
Holocrine secretion—cells rupture and become part of the secretion. 🛢️🧴
What is a goblet cell, and what does it secrete?
A unicellular exocrine gland that secretes mucus. 🫙🌫️
What are the structural types of multicellular exocrine glands?
Simple (unbranched duct) and Compound (branched duct). 📊🏭
