Chapter 8 Flashcards
What is a tissue?
Group of cells held together by an extra cellular matrix, which are similar in structure and function
What are the 4 main types of tissue
Epithelial
Connective
Muscle
Nervous
What are the 3 primary germ layers seen 2 weeks after conception
Endoderm
Mesoderm
Ectoderm
What is histogenesis
The differentiating of germ layers giving rise to various organs and tissues
What is the breakdown meaning of extra- Cellular Matrix-
Outside= extra
Matrix = a surrounding medium or structure
3 components of extra cellular matrix
Collagen, elastin, glycoproteins and proteoglycans
5 characteristics of collagen
- twister bundle of fibers
- very strong
- can be stretched
- most abundant ECM
- weakens as we age
2 features of Elastin
Rubbery and stretchy
2 features of glycoproteins and proteoglycans
A combination of proteins and carbs
Ability for tissue to repair depends on _______
Vascularity
______ and _______ tissue have the greatest capability to repair
Epithelial and connective
______ and _____ tissue have limited ability to repair
Muscle an nerve tissue
Cartilage is slow to repair as it is _______
A vascular
During repair, damaged tissue is removed by
Phagocytes
Scars form if gap to be filled is
Wide
Keloid scars are
Thick scars that develop in lower layers of the skin
A membrane is….
A thin sheet like structure
What are the 3 functions of body membranes
Cover and protect internal and external organs
Anchors organs and bones
Secrete lubricating fluids to reduce friction
Two major types of body membranes are
Epithelial and connective
Epithelial has _______ distinct layers which are
Epithelial tissue and underlying layer of connective tissue
3 types of epithelial membranes
Cutaneous, serous and mucous
Connective tissue membranes are composed of _____ and no ____
Various types of connective tissue and no epithelial cells
__________ is the most widespread and diverse tissue in the body
Connective tissue membrane
Cutaneous membrane or skin is the primary organ of the
Integumentary system
Cutaneous membrane is largest _____ and accounts for _______ of body weight
Largest organ
16%
Cutaneous membrane is made up of
Superficial layer of epithelial cells and underlying layer of supportive connective tissue
What is the purpose of serous Lubricating fluid
Decrease friction between organs and their surrounding
Describe pleurisy
Serous membrane disease which is inflammation of the serous membrane that line the chest cavity and covers the lungs
Describe peritonitis
Serous membrane disease that results in inflammation of the serous membranes that line the walls of the abdominal cavity and cover the abdominal organs
Epithelial cells produce mucous which acts to…
Keep membrane soft, moist and protect underlying cells
Also can act as a trap
What is the mucocutaneous junction and examples
Transition area where skin and mucous membranes meet
Ex eyelids, nostril and anus
Example of connective tissue membrane
Synovial membranes
