The Integumentary when you squeeze it – water release
(secretion).
System
1. Four tissue types, their roles, &
characteristics
2. Cell types in the layers of skin
Layers of epithelium
3. Receptor types
4. Temperature regualtion Both layers are transitional
Tissues – FOUR TISSUE TYPES ① Apical surface (top layer): forms
the interface between the
Epithelium: lining of organs and extracellular environment &
body, secrete/absorb fluids underlying tissues
Basal surface (basement
Connective tissue: holds body membrane): thin, non-cellular layer
together that intervenes the epithelium &
connective tissue
Muscle tissue: movement
Simple vs stratified epithelial tissue
Nervous tissue: electrical signalling
Each organ has at least 2 tissue types
(usually has all four) T
Epithelium ① y
p
Cellular properties, functions & es
structure of epithelium of
Cellular properties
1) Regenerates quickly
2) Avascular: no/few blood vessels
within it. epithelia
3) Basement membrane: an
Main categories of epithelia
extracellular matrix that lines the
basal side, provides physical and Squamous epithelial cells: flat
biochemical cues to overlying cells thin cells
allowing sculpting of the tissue. Cuboidal epithelial cells: square
4) Many cells, little matrix (tightly
cells
packed)
Functions
1) Protection – barrier to the
environment, covers surfaces,
lines organs.
2) Absorption – depends on cell
junctions and transporters.
3) Secretion – transporters &
vesicles
4) Filtration – gap junctions
💡Think of epithelium like a wet suit. It
protects you, absorbs water
(absorption), only lets some in (filters),
, Columnar epithelial cells: largest, Made of neurons & glial cells.
column shaped cells. Responsible for computation &
Connective tissue ①
Types of connective tissue
Type Subcategory/description
Loose Areolar tissue: a network of
fibres & matrix. Surrounds
blood vessels, nerve bundles,
muscles & organs. Fills spaces
btwn. organs. Connects skin to
underlying muscle.
Adipose: consists of
adipocytes (fat)
Reticular tissue: collagen
rich tissue
Dense Dense regular tissue:
tendons
Dense irregular tissue:
dermis, capsules
Elastic tissue: stretchy tissue
found particularly in blood
vessels (creates a capacity to
handle and resist great communication that the nervous system
volume changes) provides.
Cartilag Resists stretch and
e compression, Find diagram of a neuron!
found in bone
Blood Much matrix & red and white
cells
Bone Matrix, NOT organ, structural
and storage
purpose for The skin
minerals Structure & layers
and
Epidermis Dermis
collagen.
Layers Status corneum, Papillary layer (upper
Stratum dermis), Reticular
granulosum layer (deep dermis)
Stratum spinosum
Find images of this kind of tissue Stratum basale
Made Stratified 20% Loose CT
Muscle tissue ① of squamous tissue, (Areolar tissue),
Upper layers are 80% Dense CT
3 types based on dead, (Status (Reticular tissue?
location corneum & Irregular/elastic???)
stratum
Skeletal muscle: granulosum)
muscle controlled Consis Keratin, Protein, Neurons, Blood
voluntarily ts of Interspersed lipids, vessels, Receptors,
stem cells in basal Hair follicles, Sweat
Cardiac muscle: layers, sweat glands, Tactile cells
heart muscle only pores collagen, Elastin.
Smooth muscle: involuntary Other Forms fingerprints Papillary layer
- fingerprints
moving muscle, particularly other Reticular layer
organ muscle. - stronger: Dense CT
more structural
Nervous tissue proteins
- Collagen & elastin:
lines of cleavage in
parallel bundles &
(secretion).
System
1. Four tissue types, their roles, &
characteristics
2. Cell types in the layers of skin
Layers of epithelium
3. Receptor types
4. Temperature regualtion Both layers are transitional
Tissues – FOUR TISSUE TYPES ① Apical surface (top layer): forms
the interface between the
Epithelium: lining of organs and extracellular environment &
body, secrete/absorb fluids underlying tissues
Basal surface (basement
Connective tissue: holds body membrane): thin, non-cellular layer
together that intervenes the epithelium &
connective tissue
Muscle tissue: movement
Simple vs stratified epithelial tissue
Nervous tissue: electrical signalling
Each organ has at least 2 tissue types
(usually has all four) T
Epithelium ① y
p
Cellular properties, functions & es
structure of epithelium of
Cellular properties
1) Regenerates quickly
2) Avascular: no/few blood vessels
within it. epithelia
3) Basement membrane: an
Main categories of epithelia
extracellular matrix that lines the
basal side, provides physical and Squamous epithelial cells: flat
biochemical cues to overlying cells thin cells
allowing sculpting of the tissue. Cuboidal epithelial cells: square
4) Many cells, little matrix (tightly
cells
packed)
Functions
1) Protection – barrier to the
environment, covers surfaces,
lines organs.
2) Absorption – depends on cell
junctions and transporters.
3) Secretion – transporters &
vesicles
4) Filtration – gap junctions
💡Think of epithelium like a wet suit. It
protects you, absorbs water
(absorption), only lets some in (filters),
, Columnar epithelial cells: largest, Made of neurons & glial cells.
column shaped cells. Responsible for computation &
Connective tissue ①
Types of connective tissue
Type Subcategory/description
Loose Areolar tissue: a network of
fibres & matrix. Surrounds
blood vessels, nerve bundles,
muscles & organs. Fills spaces
btwn. organs. Connects skin to
underlying muscle.
Adipose: consists of
adipocytes (fat)
Reticular tissue: collagen
rich tissue
Dense Dense regular tissue:
tendons
Dense irregular tissue:
dermis, capsules
Elastic tissue: stretchy tissue
found particularly in blood
vessels (creates a capacity to
handle and resist great communication that the nervous system
volume changes) provides.
Cartilag Resists stretch and
e compression, Find diagram of a neuron!
found in bone
Blood Much matrix & red and white
cells
Bone Matrix, NOT organ, structural
and storage
purpose for The skin
minerals Structure & layers
and
Epidermis Dermis
collagen.
Layers Status corneum, Papillary layer (upper
Stratum dermis), Reticular
granulosum layer (deep dermis)
Stratum spinosum
Find images of this kind of tissue Stratum basale
Made Stratified 20% Loose CT
Muscle tissue ① of squamous tissue, (Areolar tissue),
Upper layers are 80% Dense CT
3 types based on dead, (Status (Reticular tissue?
location corneum & Irregular/elastic???)
stratum
Skeletal muscle: granulosum)
muscle controlled Consis Keratin, Protein, Neurons, Blood
voluntarily ts of Interspersed lipids, vessels, Receptors,
stem cells in basal Hair follicles, Sweat
Cardiac muscle: layers, sweat glands, Tactile cells
heart muscle only pores collagen, Elastin.
Smooth muscle: involuntary Other Forms fingerprints Papillary layer
- fingerprints
moving muscle, particularly other Reticular layer
organ muscle. - stronger: Dense CT
more structural
Nervous tissue proteins
- Collagen & elastin:
lines of cleavage in
parallel bundles &
