Body Cavities, Tissues and Membranes

Chapter 1

Epithelial

covers body surface and lines cavities

Muscular

provides movement

Connective

supports and protects body organs

Nervous

transmits electrical signals to quickly communicate internally

What are the 3 types of muscle tissue?

cardiac, skeletal, smooth

Membrane = ?

wall

What is the main purpose of membranes?

maintain boundaries between internal and external

What two types of membranes have been introduced so far?

plasma and serosa/serous

Plasma membrane

selectively permeable barrier that separates cell from surrounding environment

Serosa/serous membrane

double-sided membrane that covers surfaces in ventral cavity

Parietal serosa

lines internal cavity walls

Visceral serosa

covers internal organs

What is secreted between the two layers of the serosa membrane and what purpose does it serve?

serous fluid reduces friction

Serous membranes can become __________ as a result of infection or other causes.

inflamed

Smooth layers of the serosa can become ______ and even ______ __________ causing __________ _____.

rough, stick together, excruciating pain

An organ is comprised of AT LEAST how many types of tissue?

2

Two sets of internal cavities

dorsal and ventral

Dorsal cavity subdivisions

cranial and vertebral

Ventral subdivisions

thoracic and abdominopelvic

Thoracic subdivisions

pleural, mediastinum, pericardial

Pleural cavities

contains lungs

Mediastinum

contains medial organs between the pleural cavities, including the pericardial

Pericardial

contains heart

Abdominopelvic subdivisions

abdominal and pelvic

Abdominal

contains stomach, intestines, spleen, liver

Pelvic

contains bladder, reproductive organs, rectum

Smaller cavities exposed to environment

orbital, middle ear, nasal, oral, digestive

Synovial

joint cavity, not exposed to environment