CH. 4 - Tissues

Question 1

Cells

Answer 1

Work together in functionally related groups called
tissues

Question 2

Tissue

Answer 2

A group of cells of similar structure that perform a
common function

Question 3

Four Basic Tissue Types and their functions

Answer 3

• Epithelial tissue — covering
• Connective tissue — support
• Muscle tissue — movement
• Nervous tissue — control

Question 4

Epithelial Tissue

Answer 4

• Covers a body surface or lines a body cavity, forms parts of most glands
• Functions of epithelia- Protection, secretion, absorption, diffusion, filtration,
  sensory reception
• Special Characteristics-
  – Cellularity- Cells separated by minimal extracellular material, joined by
  special junctions
  – Polarity- Cell regions of the apical surface differ from the basal surface
  ▪ apical: exposed
  ▪ basal: attached to basement membrane
  – Supported by connective tissue
  – Avascular but innervated- Epithelial cells receive nutrients from
  underlying connective tissue
  – Regeneration- Highly mitotic