Unit 8: Body Cavities, Organs, and Membranes

Question 1

What are 2 dorsal body cavities?

Answer 1

Cranial cavity and vertebral cavity

Question 2

What are the 2 divisions of the thoracic cavity?

Answer 2

Pericardial (heart)
Pleural (lungs)

Question 3

True or false: organs consist of 2 or more tissue types

Answer 3

True. In fact many organs contain all 4 major types of

Question 4

What are the 4 types of membrane?

Answer 4

Mucous
Serous
Synovial
Cutaneous

Question 5

What are the 2 layers of the mucous membrane?

Answer 5

Epithelial layer = in contact with the lumen of the organ
Lamina propria = connective tissue that connects the epithelial to the wall of the organ

Question 6

True or false: both the epithelial layer and the lamina propria layer are avascular

Answer 6

False. The epithelial is avascular and contains many goblet cells, however the lamina propria is made of loose areolar tissue, which makes it vascular

Question 7

The mucous membrane can also be called the ______ of the digestive, respiratory, urinary, reproductive systems

Answer 7

mucosa

Question 8

What is the main difference between mucous membranes and serous membranes

Answer 8

Mucous membranes line the cavities of organs that open directly to the body exterior (e.g. respiratory or digestive systems). Serous membranes line the cavities that do NOT open to the exterior (e.g. abdominal and thoracic cavities)

Question 9

What layers make up a serous membrane and how many are there?

Answer 9

It is a double layered membrane with each layer composed of simple epithelium bound to an areolar connective tissue. The parietal layer sits against the cavity wall and the visceral layer sits against the organ

Question 10

How are serous membranes named for their locations?
______ = heart
______ = lung
______ = abdominal organs

Answer 10

Pericardium = heart
Pleura = lung
Peritoneum = abdominal organs

Question 11

True or false: synovial membranes consist of a single layer of connective and epithelial tissue

Answer 11

False. Synovial membranes only have one type of tissue, areolar connective (therefore not an organ)

Question 12

This membrane consists of a stratified squamous epithelium and both areolar and dense irregular connective tissues

Answer 12

Cutaneous membrane, which makes up skin

Question 13

What are 3 central body cavities?

Answer 13

Thoracic
Abdominal
Pelvic