Tissues Lecture Flashcards
Epithelial tissue does what?
covers body surfaces
connective tissue does what?
supports, connects
muscle tissue does what?
contractions
nervous tissue does what?
communicates
Name the tissue?
-Forms boundaries between different environments, protects, secretes, absorbs, filters
Epithelial
Name the tissue?
-Supports, protects, binds other tissues together
Connective
Name the tissue?
-Contracts to cause movement
Muscle
Name the tissue?
-Internal communication
Nervous
Name the surface is toward a lumen (open space)
Apical
Name the surfaces are toward other epithelial cells
Lateral
Name the surface is toward the basement membrane
Basal
Cells have polarity. Name the 3?
Apical, Lateral, Basal
Which surface may bear microvilli (e.g., brush border of intestinal lining) or cilia (e.g., lining of trachea)
Apical
Which surface is Noncellular basal lamina of glycoprotein and collagen lies adjacent to
Basal Surface
Which surface binds directly to other cells through desmosomes, tight junctions, or gap junctions
Lateral
What tissue is this?
- Cells are tightly packed and attached by cell junctions (tight junctions and desmosomes)
- ________tissue is avascular (lacks circulatory system)
- _______tissue lacks a nervous system (Nerves only send projections into tissue)
- It Is supported by connective tissue reticular lamina (under basal lamina)
- Covers the surfaces of the body (internal and external)
- Has a high rate of regeneration
Structural Characteristics of Epithelial Tissue
Name the Cell Junction
- Keep substances from passing between cells
- Line Simple Epithelia
- Columnar Epithelia in the Intestine
Tight Junction
Name the cell junction
- Allow small molecules and ions to pass through to adjacent cells
- Found in most epithelial cells
- Nerve and Cardiac cells
Gap Junctions
Name the cell junction
–Mechanical protein links which bind cells together in tissues subject to considerable stretching
*Found in skin, heart, muscle, and uterus
Desmosomes
Name the Cell Junction
–Mechanical protein links which bind cells to the basement membrane in most tissue
Hemidesmosomes
Name the Cell Junction
-–Weak glycoprotein bonds which assist tight junctions in binding epithelial cells together
Adherance Junctions
one layer of cells
simple
more than one layer of cells
Stratisfied
The cells are much wider than they are tall.
squamous
The cells are about as wide as they are tall.
cuboidal
The cells are much taller than they are wide.
columnar
Name the cell
-One layer of squamous shaped cells
Location: Lung Alveoli (endothelium)
Blood/lymphatic (endothelium)
Heart (endothelium)
Serous membranes (mesothelium)
Function: Allows diffusion and filtration of material where protection is not important.
Simple Squamous Epithelium
Name the cell
-One layer of cuboidal cells
Location: Tubules of kidneys, Pancreas, Thyroid, Small glands, Ovary
Function: Secretion &Absorption
Simple Cuboidal Epithelial Cells