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4 types of tissues
- 1. epithelial
- 2. connective
- 3. muscle
- 4. nervous
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Epithelial: (4)
- 1. covers body & many of its parts
- 2. forms continuous sheets
- 3. contains no blood vessels
- 4. cells packed closely together
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Shapes of cells (epithelial): (3)
- 1. Squamous...flat, scalelike
- 2. Cuboidal...cube-shaped
- 3. Columnar...taller than they are wide
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Arrangements of cells (epithelial): (3)
- 1. Simple...single layer of same shaped cells
- 2. Stratified...many layers of same shaped cells
- 3. Transitional...many layers of differently shaped cells
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Types of Epithelial Tissue: (6)
- 1. Simple Squamous E.T.
- 2. Stratified Squamous E.T.
- 3. Simple Columnar E.T.
- 4. Stratified Transitional E.T.
- 5. Pseudostratified E.T.
- 6. Glandular/Simple Cuboidal E.T.
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Simple Squamous E.T.: (looks, fx, find, & imp. note)
- Looks: single layer of flat, scale-like cells
- Fx.: absorption
- Find: make up lungs
- Imp. note: very thin, so air goes in & out easily; one layer allows it to be even easier for oxygen to get in & out vs. many layers
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Stratified Squamous E.T.: (looks, fx, find)
- Looks: many layers of flat, scale-like cells
- Fx.: protection
- Find: skin
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Simple Columnar E.T. (looks, fx, find)
- Looks: single layer of cells that are taller than they are wide
- Fx.: absorption
- Find: digestive system (stomach, intestines, etc.)
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Stratified Transitional E.T.: (looks, fx, find, & imp. note)
- Looks: many layers of cuboidal cells
- Fx.: protection
- Find: urinary bladder
- Imp. note: stretches
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Pseudostratified E.T.: (looks, fx, find)
- Looks: appears as 2 layers, really only one
- Fx.: protection
- Find: lining of trachea
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Glandular/Simple Cuboidal E.T.: (looks, fx, find)
- Looks: single layer of cube-shaped cells
- Fx.: secretion (opposite of protection)
- Find: groups of cells called glands
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Connective Tissue: (5, 1 w/ 2 subcategories)
- 1. most abundant tissue type in body
- 2. found in skin, membranes, muscles, bones, blood, & internal organs3. looks like delicate, paperthin webs; strong, touch cords; rigid bones; & fluid like blood
- 4. quality & appearance of C.T. determined by 2 things
- a. Matrix
- b. fibers
- 5. made up of fewer cells than E.T.
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Matrix
intercellular fluid
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fibers: (3)
- tough
- made of strong, white collagen
- strengthens C.T.
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Types of C.T.: (7)
mnemonic = Adorably Amusing Babies Can Find Happy Blankies
- 1. Areolar
- 2. Adipose
- 3. Bone
- 4. Cartilage
- 5. Fibrous
- 6. Hemopoietic
- 7. Blood
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Areolar C.T.: (4)
- 1. most widely distributed
- 2. like glue
- 3. gives organs form
- 4. matrix = gel-like
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Adipose: (2)
- 1. fat tissue
- 2. stores lipids
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Fibrous: (1 + ex.)
- 1. contains lot of collagen fibers in matrix
- 2. example = tendons
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Bone: (1)
matrix = rigid/hard & calcified
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Cartilage: (1)
matrix = gel-like
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Blood: (1)
matrix = liquid
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Hemopoietic/hematopoietic: (2)
- 1. in red bone marrow cavities
- 2. responsible for formation of blood cells
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Muscle Tissues: (2)
- 1. allows us to move (movement specialist)
- 2. able ot contract (shorten)
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Types of Muscle Tissue: (3)
- 1. Skeletal
- 2. Cardiac
- 3. Smooth/visceral
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Skeletal: (3)
- 1. voluntary muscle (we have control over it)
- 2. attaches to bone
- 3. produces controlled movements
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Cardiac: (2)
- 1. involuntary
- 2. makes up the walls of the heart
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Smooth/Visceral: (3)
- 1. involuntary
- 2. makes up walls of blood vessels
- 3. lines hollow internal organs (ex. intestines, stomach)
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Nervous Tissue: (function)
communication
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Types of Nervous Tissue: (2)
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neurons: (1)
1. conducting units
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neuroglia: (1)
1. supporting units
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