Chapter 4 Tissues Flashcards
Name and describe the 4 Types of tissues in the human body.
1) Epithelial Tissue - Covers body surfaces, lines body cavities, hollow organs and ducts(tubes) and forms glands.
2)Connective Tissues - Protect and supports the body and organs. Binds organs together, stores energy reserves as fat and provides immunity.
3)Muscular Tissues - generates physical force needed to make body tissues move.
4)Nervous Tissues - Detects changes inside and outside body, transmits nerve impulses and coordinates body activities.
What is Cell Junction?
The point of contact between plasma membrane of tissue cells. - Tightly joins tissues.
What are the two types of Epithelial Tissues?
1)Covering and Lining
2)Glandular epithelium - makes up secreting portions of glands such as sweat glands.
What are the General Features of Epithelial Tissues?
- Tightly packed cells with minimal extracellular material between cells - arranged in sheets or layers.
- Multiple surfaces - Apical Surface is most superficial layer and basal layer is the deepest layer.
- I Avascular but has nerve supply
- Has a high capacity for renewal by cell division.
How are Covering and lining Epithelium Classified?
It is classified by its 1) Arrangement of cells in layers and 2)Cell shapes.
What is the types of Cell arrangement of covering and lining epithelium?
1)Simple Epithelium - one layer.
2)pseudostratified - appears to be multiple layers because nuclei are at different levels.
3)stratified - Multiple layers - two or more.
What is the different Cell Shapes of Covering and lining epithelium?
1)squamous - is flat and thin
2)Cuboidal - cube like - tall as they are wide.
3)Columnar - Rectangular
4)Transitional - Variable - changes shape.