Topic 8: Simple Organs - Membranes Flashcards
In the simplest organs, how many tissue types are there?
2
What are the 2 tissue types in simple organs? (2)
- consist of epithelium attached to CT
- with a basement membrane between them
What are the 4 membrane types?
- Mucous membranes (mucosa)
- Serous membranes (serosa)
- Synovial Membranes
- Cutaneous Membrane
What is the function of mucous membranes?
- line body cavities which open directly to the body exterior
- also called the mucosa of the… e.g. digestive, respiratory, urinary, reproductive systems
What are the two layers of mucosa? What is their purpose?
- epithelial layer (avascular) which varies from simple squamous to pseudostratified
- CT (loose areolar - vascular), named the lamina propria, which nourishes epithelial cells
What is the function of serous membranes? (2)
- line closed cavities that DO NOT open to the exterior
ex. abdominal and chest cavities - covers exterior surface of organs in these cavities
What is the structure of serosa?
- double membranes, each composed of epithelial layers (often simple squamous), next to serous cavity, and CT (areolar)
What are the double membranes of serosa called? Where is it located?
parietal layer = against cavity wall
visceral layer = against organ
What lies in between the parietal and visceral layers?
serous fluid (slippery)
The double membranes are named for location. Give 3 examples.
1) pericardium (heart)
2) Pleura (lungs) ex. parietal and visceral pleura
3) Peritoneum (abdominal organs)
Where are synovial membranes located?
in your joints
What type of tissue make up the synovial membranes?
- areolar CT
- no epithelium tissue
Are synovial membranes organs?
no, because it is only made of one tissue type
Where are cutaneous membranes located?
- skin
