Lesson 10: epithelial tissue types Flashcards
What is the primary function of lining epithelium?
Covers surface of body, body cavities, blood, lymphatic vessels, respiratory, digestive, genitourinary tracts
Lining epithelium is arranged in layers lining the external surface or cavities.
What are the three classifications of the number of layers in epithelial tissue?
- Simple
- Stratified
- Pseudostratified
These classifications help determine the structure and function of the epithelium.
What are the different cell shapes found in epithelial tissue?
- Squamous (flat)
- Cuboidal
- Columnar
Cell shape affects the function and location of the epithelial tissue.
What is endothelium?
Single layer of flat cells lining blood and lymphatic vessels
Endothelium is crucial for the vascular system and is found in various body structures.
What is mesothelium?
Single layer of flat cells lining the peritoneal, pericardial, and pleural cavities
Mesothelium helps protect and lubricate internal organs.
What is the protective function of the epidermis?
Several layers of cells that flatten as they move away from the basal membrane
This structure is found in highly exposed areas such as the skin.
What role do melanocytes play in skin color?
Produce melanin to protect DNA from UV radiation
The amount of melanin varies based on ethnicity and UV exposure.
What is the effect of dark skin on solar radiation?
Protection against solar radiation
Dark skin provides a natural barrier against harmful UV rays.
What is the function of glandular epithelium?
Specialized in producing secretions (glands)
Glandular epithelium includes both exocrine and endocrine glands.
What are exocrine glands?
Glands that pour their contents through a duct to an external surface or body cavities
These include unicellular and multicellular glands.
What are the two types of secretions from glands?
- Serous glands → watery, enzyme-rich fluid
- Mucous glands → thick, mucus-rich secretions
Mixed glands can produce both types of secretions.
What do endocrine glands do?
Release hormones into the bloodstream
Endocrine glands play a crucial role in regulating bodily functions.
What are amphicrine glands?
Glands that are both exocrine and endocrine at the same time
Examples include the liver and pancreas, which perform different functions.
Fill in the blank: The secretion of serous glands is _______.
watery, enzyme-rich fluid
This type of secretion is important for various physiological processes.
Fill in the blank: The secretion of mucous glands is _______.
thick, mucus-rich secretions
Mucous secretions help trap pathogens and lubricate surfaces.
