Chapter 4: Tissue Level of Organization Flashcards
Tissues arise from what 3 primary germ cells?
- Ectoderm
- Mesoderm
- Endoderm
What germ layer becomes the outter skin?
Ectoderm
The end orders gives rise to the inner skin? True or False?
True.
The mesoderm gives rise to _______.
Gelatinous material called me scheme that forms the connective tissue in the muscles
What are the 4 basic tissue types?
- Epithelial
- connective
- muslce
- Nervous tissue
What do tight junctions do?
Prevent substances from moving between cells (can be leaky)
What are desmosomes?
Thickening proteins that zip cels together and form the plaque across cytoplasm
What are the 2 types of epithelial tissues?
- Cover surfaces and line cavities
2. form glads
What are the 2 types of glands?
- Endocrine
2. Exocrine
Explain the 3 modes o secretions of exocrine glands.
- Merocrine: secrete porducts by exocytosis
- Holocrine: entire cell fills with secretion and is shed
- Aprocrine: part of cell pinches off as secretion
What is the most abundant and varied tissue type?
Connective Tissue
wHwt are the 3 common components of connective tissue?
1) Cells
2) Ground substance
3) fibres
What makes up the ground substance?
Ground substance and protein fibres matrix
What are the 3 types of fibres?
Collagen, elastic, reitucular
What are the 3 Loose Connective Tissues?
Areolar, adipose, reticular
What are the dense connective tissues?
Dense regular CT & Dense regular irregular CT
The three main types of cartilage are…..
Hyaline, elastic, fibrocartilage
Why is cartilage thin?
Because it is avasulcar, it has to be thing because it relays on diffusion to receive its blood supply
Is bone a connective tissue?
Yes!
Explain mucous membranes.
Line the openings to the exterior of the body (respiratory/digestive system organs)
Serous membranes form the ______.
Close cavities and cover organs.
Dictate between visceral and parietal serous membranes.
Parietlal: live body cavities
Visceral: cover organs
The ______ membrane is the skin.
Cutaneous
What is the function of skeletal muscle
?
Move bones of the skeleton
Which type of muscle propels contents of hollow organs?
Smooth muscle
Which type of muscle fibre is branded?
Cardiac
Which type of muscle fibre contains multiple nuclei ?
Skeletal
What are the 2 major cell steps of nervous tissue?
Neurons and neuroglia
