Integumentary System Flashcards
What are the functions of the integumentary system?
- Protection
- Containment
- Heat Regulation
- Sensation
- Synthesis & storage of vitamin D
What is the basic structure of the integumentary system?
- Epidermis
2. Dermis
Epidermis
- Tough outer protective layer
- Avascular
- Nourished by the
underlying Dermis
Dermis
- Vascular
Contains:
- Dense layers of Collagen and Elastic Fibers
- Nerve receptors
- Hair follicles
- Sebaceous glands
Superficial Fascia
- Contains sweat glands, fat, nerves & vasculature
What wraps all of the body’s deep structures?
Fascia
What are the two layers of superficial fascia?
- Outer fatty layer
2. Inner membranous layer
Deep Fascia
Dense connective tissue
- Surrounds muscles & neuromuscular bundles
- Muscles can attach here
- Blends with CT (connective tissue) covering of bones (Periosteum)
- Aides in vascular return
Fascia Compartments
CT ‘bags’ that divide muscle groups
- Separated by Intermuscular Septa
- Can contain or allow spread of infection, tumors & swelling
Reinacula
- Found near joints
- Hold tendons in place
- Prevent ‘bowstringing’
What is a bursae?
Fascia sacs that reduce friction
Bursae
- Normally collapsed
- Can communicate with joints & contain synovial fluid
- Very important clinically
** Difficult to see in lab **
What are the types of Bursae?
- Subcutaneous
- Subfascial
- Subtendinous
- Synovial tendon sheaths
What are collapsed bursae sacs and what is their function?
Double layer of serous membranes and form sacs that surround organs.
** Organs are surrounded but not completely inside the sacs**
What are serous membranes?
A membrane that produces a serous (lubricating) fluid.
What is the bursal sac around the lungs called?
Pleura
What is the bursal sac around the abdominal viscera called?
Peritoneum
What is the bursal sac of the heart called?
Pericardium
What are the layers of a bursal sac?
- Visceral layer
- On surface of organ, not detachable, would ruin the organ tissues if we tried to detach
- Parietal layer
** Fascia layers allow for movement and expansion and function normally **
What is under the parietal peritoneum layer?
Subserous fascia
