Tissues Flashcards
What tissue covers body surfaces and lines hollow organs, body cavities and ducts?
Epithelial tissue
What tissue protects and supports the body and its organs, binds organs together, stores energy reserves as fat and provides immunity against disease-causing organisms.
Connective tissue
What tissue generates the physical force needed to make body structures move and generates body heat?
Muscular tissue
What tissue detects changes in inside and outside body conditions and sends responses?
Nervous tissue
How are epithelial cells arranged?
In continuous sheets in single or multiple layers. Tightly packed together with little interstitial space between the cells.
Why don’t epithelial tissues have blood supplies?
To prevent bleeding as they are constantly exposed to wear and tear
How are epithelial tissues supplied with nutrients?
Diffusion from blood vessels of the lamina propria through the basement membrane
What are the two forms of epithelial tissue?
Covering and lining
Glandular
What are the main functions of epithelial tissue?
Protection
Secretion
Absorption
What is basement membrane composed of?
More epithelial cells
What does squamous tissue’s flat and thin structure allow for?
Rapid passage of substances
Where do exocrine glands secrete into?
Into epithelial tissues whether through ductal systems or directly
What kind of glands secrete mucus, saliva, digestive juice and earwax?
Exocrine
What glands secrete into blood and lymph vessels?
Endocrine
What glands secrete hormones?
Endocrine
What are the classifications of multicellular glands?
Branched or unbranched
Tubular or alveolar
What are fibroblasts?
Large cells with irregular processes, they produce collagen fibre, elastic fibre and the extracellular matrix
Why do macrophages have granuals in their cytoplasm?
For antimicrobial activity against intracellular pathogens
What cells are usually present in connective tissue?
Fibroblasts
Fat cells
Macrophages
Leukocytes
Plasma cells
Mast cells
What are mast cells?
Cells that sit alongside blood vessels supplying connective tissue, they produce histamine.
What does histamine do?
Dilates blood vessels
What are the main types of mature connective tissue?
Loose, dense, cartilage, bone, liquid.
What is the most common type of connective tissue?
Areolar
How much of the body is made up of adipose tissue?
Usually 20-25%
