Please enable JavaScript.
Coggle requires JavaScript to display documents.
Week 3 (Classification (simple squamous
-single layer
-thin and flat…
Week 3
Classification
simple squamous
-single layer
-thin and flat cells
Location lining of body cavities/vessels
Function secretion, absorption, decrease friction
simple cuboidal
-single layer
-cube-shaped cells
Location glands, ducts, and kidney tubules
Function secretion, absorption
simple columnar
-single layer
-column-shaped cells
Location lining of stomach, intestines
Function secretion, absorption, and protection
stratified squamous
-several layers
-thin and flat cells
Location skin, lining of mouth
Function protection
stratified cuboidal
-several layers
-cube-shaped cells
Location rare
Function protection,secretion,absorption
-
-
pseudostratified ciliated columnar
Location lining of respiratory tract
Function protection, secretion, and mucus removal
Epithelial Tissue
-
-
external skin and lining of respiratory, digestive, reproductive, and urinary tracts
Function
-produce secretions (gland cells)
-structures that produce fluid secretions are called glands
Characteristics
-bound closely together by cell junctions
-have an exposed surface (faces exterior of body or an internal space) and a base
-attach to underlying connective tissue via basement membrane
-avascular (lack blood vessels)
-receive nutrients via diffusion or absorption
-regeneration
Connective Tissue
Function
-fills internal spaces
-provides structural support for other tissues
-transports materials within the body
-stores energy
Consists of
-specialised cells
-extracellular protein fibres (collagen fibres, reticular fibres, or elastic fibres) matrix
-fluid called ‘ground substance’ matrix
Classification
-connective tissue proper
e.g. loose adipose dense ligaments
-fluid connective tissue
e.g. blood and lymph
-supporting connective tissue
e.g. bones and cartilage
Skeletal system
bone, cartilage, ligaments
Function
-support
-protection
-minerals(calcium) and lipid storage
-blood cell production
-leverage e.g. bones function as levers
Bone
- Sutural skull
-Irregular vertebra
-Short carpal
-Flat skull, ribs
-Long humerus
-Sesamoid patella
Composition
-bone matrix extracellular protein fibres, ground substance (fluid), and inorganic compounds (e.g. calcium)
-bone cells accounts for 2% of bone weight
osteogenic stem cells that ultimately become osteoblasts
osteoblasts immature bone cells, produce new bone matrix (‘ossification’ or ‘osteogenesis’) homeost.
osteocytes mature bone cell,maintains bone matrix
osteoclasts absorb and remove bone matrix homeost.
Compact bone
protect, support, and resist stress
Osteon
(or Haversian system)
-basic functional unit of mature compact bone
-osteocytes are arranged in a concentric pattern
-
-
Canaliculi
-narrow passageways that permit transportation of nutrients and waste between osteocytes and blood vessels
Integumentary System
skin, hair, sweat glands, nails
Function
-protection against environmental hazards
-excretion of salt, water, and organic wastes
-body temperature regulation
-synthesis of vitamin D
Major parts
-cutaneous membrane
*epidermis: superficial epithelium
dermis: connective tissue
-accessory structures
hair, glands, and nails
-
Epidermis
stratified squamous epithelium
keratinocytes: contain keratin (protein) water resistance
melanocytes: produce melanin (pigment) protects skin from UV radiation
-
-
-
-