Chapter 4 Flashcards
Are collections of cells of same type that perform a common function
Tissues
Study of tissue
Histology
Four major types of tissues:
Connective, muscle, nervous, and epithelial tissue
Connects and supports; other functions in more specialized tissues
Connective tissue
Specialized cells, ground substance, and protein fibers
Connective types
Ground substance + protein fibers =
Matrix
Stores fat
Adipose cells
Fills Spaces between cells and fibers
Ground substance
Branched and stretchable
Elastic fiber
Divides to produce other types of cells
Sterm cell
Unbranches, stern but flexible
Collagen fibers
Divides to produce other types of cells
Fibroblast
Branched, thin, and forms network
Reticular fiber
Engulfs pathogens or produces antibodies
White blood cell
Matrix is semisolid and contains collagen and elastin fibers
Fibroblasts
Includes areolar and reticular connective tissues and adipose tissue
Loose fibrous connective tissue
Found in ligaments and tendons
Dense fibrous connective tissue
Extracellular matrix is solid
Supportive connective tissue
Consists of formed elements and Plasma
Blood
Comes from tissue fluid; transported by lymphatic vessels to bloodstream
Lymph
Muscle tissue function
Provide movement
Specialized to contract or shorten
Fibers
3 types of muscle tissue
Skeletal, cardiac, and smooth
Striated and voluntary; connects to bones and skin
Characteristics of skeletal
Locations of skeletal
Widespread
Striated and involuntary; intercalated disks join cells
Characteristics of cardiac
Location of cardiac
Heart
Non-striated and involuntary
Characteristics of smooth
Walls of hollow organs, blood vessels
Locations of smooth
Allows communication within the body
Nervous tissue
Allow communication; consists of cell body, dendrites, and axon
Neurons
Support and nourish neurons; probably allow communication too
Neurogila
Found in brain, spinal cord, and axon
Location of nervous tissue
Covers, lines, and protects; may also be involved in secretion, absorption, excretion, and filtration
Epithelial tissue
Anchors epithelium to underlying connective tissue
Basement membrane
One layer
Simple
Multipllayerse
Stratified
One layer that looks like multiple
Pseudostratified
Squamous, cuboidal, and columnar
Shapes of cells
Lining of lungs, blood vessel, protects
Simple squamous
Lining of kidney tubules various glands; absorbs nutrient
Simple cuboidal
Lining of small intestine, uterine tubes; absorbs nutrients
Simple columnar
Lining of trachea; sweeps impurities towards throat
Pseudo stratified columnar
Lining of nose, mouth, esophagus, anal canal, and vagina; protects
Stratified squamous
Secrete a product
Glandular epithelia
Have ducts to secrete products onto surfaces or into cavities
Exocrine glands
Lack ducts and secrete hormones into bloodstream
Endocrine glands
Composed of two or more tissue types and perform one or more functions
Organs
Line cavities and internal organs
Body membranes
Consists of thoracic, abdominal, and pelvic cavities; thoracic and abdominal cavities separated by diaphragm
Ventral cavity
Consists of cranial cavity and vertebral canal
Dorsal cavity
Contains esophagus, heart, and lungs
Thoracic cavity
Contains digestive and other organs
Abdominal cavity
Contains reproductive and other organs
Pelvic cavity
Ability of body to maintain relatively stable internal environment
Homeostasis
Protection, regulation of body temp, synthesis of vitamin D, and providing sensation
Integumentary system
Composed of stratified squamous epithelium; cells lost and replaced frequently
Epidermis
No blood vessel
Avascular
Cells that produce waterproofing, protective protein called keratin
Keratinocytes
Cells that produce pigment called melanin
Melanocytes
Protects genetic information in cells from uv light; more produced when exposed to sunlight
Melanin
Composed primarily of dense fibrous connective tissue
Dermis
Contains blood vessels
Vascular
Supportive layer on which skin rests
Subcutaneous layer (hypodermis)
Involved damage to epidermis only
First- degree burns
Involved damage to epidermis and dermis
Second- degree burns
Involve damage to epidermis, dermis, and subcutaneous layer
Third-degree burns