A&P - Chapter 8 (Part 2) Flashcards
What does tissue repair depend on?
Vascularity
What type of tissues have the greatest capacity to repair? (2)
- Epithelial
2. Connective
What type of tissues have a limited ability to repair? (2)
- Muscle
2. Nerve
What is slow to repair?
Cartilage
Why is cartilage slow to repair?
Because it is avascular
- no blood flow
What are damaged tissues removed by?
Phagocytosis
What happens after phagocytosis occurs?
The surrounding tissue cells divide and fill in the gaps
How do scars form?
If the gap that needs to be filled by the dividing cells is wide
Keloid scars
Thick scars that can develop in lower layers of the skin
Why are epithelial and connective tissues easy to repair? (2)
- Vascular
2. Not specific
Membrane
Are a think sheet like structure found throughout the body
What do membranes do?
Cover and protect internal and external surfaces and organs
What do membranes secrete?
Lubricating fluids
Why do membranes secrete lubricating fluids?
To reduce friction
- allows movement
What are 2 major types of membranes in the body?
- Epithelial tissue membranes
2. Connective tissue membranes
What are 3 types of epithelial membranes?
- Cutaneous
- Serous
- Mucous
What are connective tissue membranes composed of?
Largely of various types of connective tissue
Are epithelial cells present in connective tissue membranes?
No
What is the most widespread and diverse tissue in the body?
Connective tissue membranes
What is an example of cutaneous membranes?
The skin
What are 2 examples of serous membranes?
- Parietal
2. Visceral
Parietal
Membrane that lines the cavities
Visceral
Membrane that covers the organs
What is the primary organ of the integumentary system?
Cutaneous membrane
- the skin
What percentage does the skin take up in weight?
16%
- largest organ
What makes up the cutaneous membrane? (2)
- Superficial layer of epithelial cells
2. Underlying layer of supportive connective tissues
