Lab Exam 1 Flashcards
Histology
Histology
The study of tissue structure and function
4 Tissue types
Epithelial
Connective
Muscle
Nerve
2 primary components of tissue
Cells of similar function
Non-living “Extracellular-Matrix”
Epithelial basic properties
Highly cellular (Composed almost entirely of cells) Little extracellular matrix Avascular Innervated Regenerative
Regenerative
Easily replaces lost cells by cell division
Avascular
Lack of blood cells
Innervated
supplied by nerve fibers
Complexity Classification of Epithelial
Simple or Stratified
Shape Classification of Epithelial
Squamous
Cuboidal
Culumnar
Epithelial Important functions
Lines the body cavities and structures (Protection & Lubrication)
Secretion of substances (Sweat)
Absorption of substances (Intestines, kidneys)
What is Simple Squamous epithelial
single layer of flattened cells with a disc shaped nuclei
Functions of simple squamous epithelial
diffusion and filtration
provide a slick, friction-reducing lining in lymphatic and cardiovascular systems
location of simple squamous epithelial
Lining of the heart
Blood vessels
Lining of ventral body cavities
Air sacs of lungs
What is the simple cuboidal epithelial
Single layer of cube-like cells with large, circular central nuclei
Function of simple cuboidal epithelial
Absorption and Secretion
Location of simple cuboidal epithelial
Ducts & secretory glands
Ovary surface
What is simple culumnar epithelial
Single layer of tall cells with an oval nuclei; many contain cilia
Function of simple culumnar epithelial
secretion and absorption
Location of simple culumnar epithelial
Most of the digestive tract
Gallbladder
Some regions of the uterus
What is pseudostratified columnar epithelial
Single layer of cells of differing heights
What is stratified squamous epithelial
Thick membrane composed of several layers of cells, (Basal cells are cuboidal or culumnar)
Function of stratified squamous epithelial
Protection of underlying tissues in areas subject to abrasion
Where is stratifies squamous epithelial located
Linings of esophagus, mouth, and vagina
Epidermis of the skin
stratified cuboidal and culumnar epithelial
very rare in the body, typically 2 layers thick
What cells make up Nervous tissue
Neurons
Neurons
Neurons are branching cells
Nervous tissue function
Transmits electrical signals from sensory receptors to effectors
Location of Nervous Tissue
Brain
Spinal cord
Nerves
Types of Connective tissue
Loose Connective
Dense Connective
Types of Loose connective tissue
Aerolar
Adipose
Types of Dense connective tissue
Dense regular
Dense irregular
What is Aerolar loose connective tissue
Gel-like matrix with all three connective tissue fibers
Function of Aerolar loose connective tissue
Wraps and cushions organs
Plays an important role in Inflammation
Holds and conveys tissue fluid
Location of aeorlar loose connective tissue
Widely distributed under epithelial of body.
Packages organs
What is adipose loose connective tissue
Closely packaged fat cells
Function of adipose loose connective tissue
Provides reserve food fuel
Insulation
Supports and protects organs
Loaction of adipose loose connective tissue
Under skin
Around kidneys and eyeballs
Abdomen
Breasts
What is dense regular dense connective tissue
Primarily parallel collagen fibers, a few elastic fibers
Tightly packed together
Organized
Function of dense regular dense connective tissue
Attaches muscles to bones
Attaches bones to bones
Good Tensile strength
Location of dense regular dense connective tissue
Tendons, most ligaments, aponeuroses
What is dense irregular dense connective tissue
Irregularly arranged collagen fibers(Unorganized)
Function of dense irregular dense connective tissue
Able to withstand tension exerted in many directions
Structural strength
Location of dense irregular dense connective tissue
Dermis of the skin
Fibrous capsules of organs and joints
Types of cartilage connective tissue
Hyaline
Elastic
What is hyaline cartilage connective tissue
No distinct shape
Halos around cell
Most common form of cartilage in the body
Location of Hyaline cartilage
Between joints Ribs Nose Trachea Larynx
Function of Hyaline cartilage
Supports and reinforces
What is Elastic cartilage connective tissue
Similar to Hyaline but more elastic fibers
Function of Elastic cartilage
Maintains the shape and structure while allowing flexability
Location of elastic cartilage
External ear
What is Bone (Osseous Tissue)
Hard, Calcified matrix with collagen fibers
Looks like tree rings
Function of bone
Supports, protects, and provides levers for muscular action
Hematopoiesis
Production of blood cells
Where does hematopoiesis occur
bone marrow
Location of bone
Bones
What is blood tissue
Red and White blood cells in a fluid matrix
Function of blood tissue
Transport of respiratory gases, nutrients, waste, and other substances
Location of blood tissue
Within blood vessels
Types of Muscle tissue
Skeletal
Cardiac
Smooth
What is Skeletal muscle tissue
Long, cylindrical multinucleate cells with obvious ridges
Looks like stripes
Function of skeletal muscle
Voluntary movement
Facial expression
Voluntary control
Location of skeletal muscle
in muscles attached to bones or occasionally skin
What is cardiac muscle
Unorganized strips that branch off, ridges, interlocking at discs
Function of cardiac muscle
as it contracts it propels blood into circulation
INVOLUNTARY
Location of cardiac muscle
The walls of the heart
What is smooth muscle
spindle shaped cells with central nuclei.
Left to right
Function of smooth muscle
Propels substances or objects along internal passageways
INVOLUNTARY
Location of smooth muscle
Walls of hollow organs
cephalic
whole head
Frontal
Forehead
Buccal
Cheeks
Occipital
Base of skull
Orbital
eye
nasal
nose
oral
mouth
mental
chin
acromial
shoulder
brachial
upper arm
antebrachial
forearm
cubital
wrist
palmar
palm of hand
digital
fingers
cervical
neck
pectoral
upper chest
sternal
breast bone
mammary
lower chest
axillary
armpit
abdominal
stomach
vertebral
spine
dorsal
back
lumbar
lower back
sacral
back pelvic
coxal
hip
inguinal
groin
gluteal
buttocks
femoral
thigh
patellar
front of knee
popliteal
back of knee
sural
calf
tarsal
ankle
pedal
foot
plantar
sole of foot
Surface towards the bottom
Basal
Surface towards the top
Apical