2.4 (Lab 4) - Cells

Question 1

simple squamous epithelia

Answer 1

• inner linings of vessels
  (blood + lymphatic vessels are ALWAYS lined with it - endothelium)
• outer surfaces of internal organs

Question 2

simple columnar epithelia

Answer 2

• prevalent in GI

- often have absorptive + secretory FXNs

Question 3

stratified squamous epithelia

Answer 3

• found in areas exposed to abrasive forces
• non-keratinzed = covering surfaces of oral cavity, vagina, etc.
• keratinized = covering dry surfaces of the skin

Question 4

golden rule of histology?

Answer 4

every free or lumenal surface in the body is lined by an epithelium

Question 5

endothelium

Answer 5

simple squamous epithelium around a blood or lymphatic vessel

Question 6

mesothelium

Answer 6

• simple squamous epithelium

- lines both the inner and outer spaces surrounding the gut (peritoneum), heart (pericardium), lungs (pleura)

Question 7

mesentery

Answer 7

• connective tissue structure suspending the intestines in the peritoneal cavity

Question 8

omentum

Answer 8

structure with similar anatomical relationship to the mesentery - extending to parts of the duodenum

Question 9

enterocyte

Answer 9

• absorptive cell
• most prevalent cell in duodenal epithelium
• has microvilli on surface
  (entero=intestine)

Question 10

goblet cell

Answer 10

• mucus-secreting cell

- second most prevalent cell in duodenal epithelium

Question 11

pectinate line

Answer 11

the point of transition within the anal canal between simple columnar epithelium to stratified squamous nonkeratinized epithelium