Body cavities

Question 1

Open body cavities

Answer 1

Continuous with outside world

Question 2

Open body cavity example

Answer 2

Lumen (internal space) of respiratory, digestive, reproductive, and urinary tracts

Question 3

Closed body cavities

Answer 3

Not continuous with outside world

Question 4

Major closed body cavity (1)

Answer 4

Dorsal body cavity, cranial cavity (brain), and vertebral cavity (spinal cord)

Question 5

Major closed body cavity (2)

Answer 5

Ventral body cavity, visceral organs, thoracic cavity (heart and lungs)

Question 6

Major closed body cavity (3)

Answer 6

Abdominopelvic cavity (mainly organs of digestive, urinary, reproductive)

Question 7

Major closed body cavity (4)

Answer 7

Serous cavities (slit like spaces within ventral body cavity)

Question 8

Membrane

Answer 8

A thin, pliable layer that covers or separates

Question 9

What is a membrane composed of?

Answer 9

Epithelium layer and connective tissue layer

Question 10

What is the function of a membrane?

Answer 10

Protection, exchange, support to anchor organs in space, sliding as organs move, sensation, etc.

Question 11

What do multicellular membranes do?

Answer 11

Line the body’s cavities and surfaces

Question 12

What type of membrane and CT does a multicellular membrane have?

Answer 12

Basement membrane and areolar CT; they are vascular

Question 13

Mucous membrane (mucosa)

Answer 13

Sometimes produces mucus into lining, lines the OPEN body cavities (ex: lumen of respiratory and digestive tracts)

Question 14

Mucus, enzymes, etc. are produced by ______

Answer 14

Active secretion

Question 15

Tissue layers of mucosa

Answer 15

Lumen –> epithelium/lamina propria (CT) –> muscle etc.

Question 16

Serous membrane (serosa)

Answer 16

Lines the spaces between and around the organs in the ventral body cavity, lines outer surface of visceral organs and inner surface of body wall

Question 17

What does the serosa produce and how?

Answer 17

Watery fluid, mainly by filtration (passive process) for lubrication

Question 18

What kind of epithelium is in the serosa?

Answer 18

Mesothelium (simple squamous)

Question 19

What are the tissue layers in the serosa? (DEEP TO SUPER)

Answer 19

Muscle etc. –> CT/mesothelium = visceral serosa –> serous cavity –> CT/mesothelium = parietal serosa –> muscle etc.

Question 20

Can organs have a mucous and serous membrane?

Answer 20

Yes, they can have one, both, or neither

Question 21

What does the ventral body cavity contain?

Answer 21

Visceral organs and serous cavities

Question 22

Cutaneous membrane

Answer 22

Skin directly exposed to outside world (has glands that secrete, active process)

Question 23

What are the tissue layers in the cutaneous membrane? (DEEP TO SUPER)

Answer 23

Muscle etc. –> dermis (CT) –> epidermis