Unit 8 - Body Cavities, Organs And Membranes

Question 1

What are body cavities

Answer 1

Enclosed spaces that house and protect organs

Question 2

Dorsal body cavity (back)

Answer 2

1. Cranial (head) cavity- brain
   - skull forms this
2. Vertebral cavity- spinal cord

Question 3

Ventral body cavity (belly)

Answer 3

1. Thoracic (chest) cavity
   - pericardial cavity - heart
   - pleural cavity - lungs
2. Abdominal cavity- digestive organs
3. Pelvic cavity- houses urinary bladder, reproductive organs and rectum

Question 4

How many tissue types do organs consist of

Answer 4

• 2 or more
• but many contain all 4 major tissue types

Question 5

How many tissue types to membranes consist of

Answer 5

1 or 2
- connective tissue with or without an epithelial tissue attached
- line the inner and outer surfaces of the body and organs

Question 6

membrane types

Answer 6

1. Mucous membranes
2. Serous membranes
3. Synovial membranes
4. Cutaneous membranes

Question 7

Mucous membranes

Answer 7

• line cavities of organs that open directly to the body exterior
• mucosa of the digestive, respiratory, urinary and reproductive systems

Question 8

2 layers of mucous membranes

Answer 8

1. Epithelial layer
2. Laminate propria

Question 9

Epithelial layer of mucous membrane

Answer 9

• top layer
• in contact with the lumen of the organ
• avascular
• many have goblet cells
• lots of villi
• ex. Line digestive tract

Question 10

Lamina propria of mucous membranes

Answer 10

• bottom layer
• connective tissue layer that connects the epithelial tissue to the wall of the organ
• made of loose Areolar connective tissue and therefore vascular
• nourishes epithelial cells

Question 11

Serous membrane

Answer 11

• lines body cavities that DO NOT open up to the exterior (closed cavities)
• ex. Abdominal and thoracic cavities (lungs)
• covers external surfaces of organs in these cavities
• double layered membranes with each layer composed of a simple epithelium bound to an Areolar connective tissue

Question 12

Parietal layer of serous membrane

Answer 12

Against cavity wall

Question 13

Visceral layer of serous membranes

Answer 13

• against organs

Question 14

What does the epithelial layer of the serous membrane secrete

Answer 14

• serous fluid into the serous cavity (slippery)

Question 15

Pericardium

Answer 15

Heart

Question 16

Pleura

Answer 16

Lung
- parietal and visceral pleura

Question 17

Peritoneum

Answer 17

Abdominal organs

Question 18

Synovial membranes

Answer 18

• in joints
• Areolar connective tissue, no epithelium
• only one tissue type therefore NOT AN ORGAN

Question 19

Cutaneous membranes

Answer 19

Skin
- epithelium= stratified squamous (named the epidermis)
- connective tissue= Areolar and dense irregular (named in dermis