Internal Surfaces of the Body

Question 0

Describe the structural relationships between the epithelia and closely associated tissues (glands, underlying connective tissue and muscularis mucosae) comprising GI, urinary and respiratory mucosae

Answer 0

Gut:
Mucosa, submucosa, muscularis externae, serosa
Mucosa - epithelia, connective tissue, muscularis mucosae
Submucosa - glands, arteries, veins, nerves
Muscularis externae - outer longitudinal, inner circular
Respiratory:
Mucosa, submucosa, muscularis externa, adventitia

Question 1

Explain mucous and serous membranes

Answer 1

Mucous membranes - line certain internal tubes which open to the exterior e.g. alimentary, respiratory, urinary
Consists of epithelium, connective tissue (lamina propria), muscularis mucosae in alimentary
Serous membranes - line certain closed body cavities e.g. peritoneum, pleural, pericardium and secrete a lubricating fluid
Consists of mesothelium that secretes a watery lubricating fluid, connective tissue
Visceral - inner, parietal - outer