Chap 4 Flashcards
2 fundamental kinds of cells in the body
- Sex Cells
- Somatic Cells
Types of body tissues
Epithelial,
Connective,
Nervous,
Muscle
Epithelial Tissue
FORMS -body cover (skin) -lining of body cavities -glandular tissue FUNCTION -protect -absorb -filter and secrete
Connective Tissue
connects and supports
Nervous Tissue
control
Muscle Tissue
Movement
Epithelia
- apical surface (exposed)
- basal surface attached to basement membrane
- avascular/ innervated
Maintaining the integrity of epithelial tissue
- Intercellular connections
- Attachment to basal lamina
- Maintenance and repair
Intercellular Connections
epithelial cells attach to one another and extracellular fibres of basal lamina
A Clear layer, or lamina tissue that contains glycoproteins and a network of fine protein filaments is?
Basal Lamina
What attaches the deepest epithelial cell to basal lamina
hemidesmosome
Encircles cells and binds them to their neighbours through bands of dense transmembrane glycoproteins attached to microfilaments
Adhesion belt
Channel proteins that form a passageway and let small molecules and ions pass
Connexons
Increases the resistance of the tissue to mechanical stress
Desmosome
Cell adhesion molecules (CAM)
Cadherin
- Simple Squamous Epthelia
- diffusion and filtration
- forms alveoli, capillary walls and endocardium
- lines body cavities
- reduces friction
Simple Squamous Epithelia LOCATION
- Mesothelia
- Endothelia
- alveoli in lungs
Substance passes through the narrow space btwn cells=
paracellular transport
substance enters cell via active or passive means =
transcellular transport
- Stratified Squamous Epithelia
- most common
- protection
- lines mouth, esophagus, apical surface
Apical surface
showed skin
- Simple Cuboidal Epithelia
- absorption and secretion
- thyroid gland
- kidney tubules
- Stratified Cuboidal Epithelia
- lining of some ducts
- protection, secretion, absorption
- Transitional Epithelia
- bladder
- permits recoil and expansion after stretching
- Simple Columnar Epithelia
- absorption and secretion
- line digestive tract
- contains goblet cells and mucous
- Stratified Columnar Epithelia
-salivary gland duct
- Ciliated Pseudostratified Epithelia
- lines most of respiratory tract
- protection and secetion
Exocrine Glands
- merocrine
- apocrine
- holocrine
What method of secretion does a mucous cell use?
Merocrine
Sweat glands =
eccrine
Armpits =
apocrine
What method of secretion does a eccrine sweat gland use?
merocrine
Connective Tissue (CT) consists of
- Cells
- Extracellular matrix : bulk of CT
- tissue fluid
- loose and dense
Connective Tissue function
- bind
- protect
- store and insulate
- transport
Can connective tissue be avascular and vascular?
yes
- Loose: Areolar Tissue
forms basement membrane
-btwn skin and muscle
: Adipose tissue
deep to skin
-padding, insulates
: Reticular Tissue
- liver, kidney, spleen
- supporting framework
Dense: Regular CT
forms ligaments and tendons
: Irregular CT
dermis of skin
: Elastic
elastic ligaments
- Fluid Connective tissue
Blood and lymph
- Supporting Connective tissue
Cartilage and bone
- synovial joints
- 2/3 of matrix = calcium salts, rest is collagen fibres
:Cartilage
- condrocytes
- avascular
:Bone
hard matrix
- vascularized
- hematopoiesis
bone cells are called
osteoblasts
Hyaline Cartilage
- synovial joint
- larynx
- stiff/ flexible support
- reduces friction
Elastic Cartilage
- ear
- support
Fibrous Cartilage
knee joint pads
-prevents bone-bone contact
What is found around the perimeter of all 3 cartilage
perichondrium
4 types of membranes
- Mucous
- Serous
- Cutaneous
- Synovial
CT layers and wrappings that support and surrounding organs
Fasciae
Nervous Tissue
- neurons and glial cells
- excitable
Muscle Tissue
- contractile tissues
- excitable tissue
- called muscle because of shape
- Skeletal, Cardiac, Smooth
Cutaneous Membrane
Epidermis and Dermis, and Hypodermis
Epidermis
- stratified squamous epithelial
- tough/ protective
- relys on dermis for nutrients
Dermis
- contains dense irregular connective tissue
- contains sweat glands na dsensory receptors
Hypodermis
- contains adipose tissue
- anchors skin to underlaying structures