A&P final unit 5 Flashcards
4 main types of tissue
Connective, epithelial, muscle and nervous
Muscle
Contractile
Thermogenic
Multi-nucleated
Types of muscle tissue
Skeletal
Cardiac
Smooth
Skeletal muscle
Attaches to and moves bones
Striated
Multinucleated and voluntary
Cardiac muscle
Muscle tissue of the heart
striated
involuntary
Smooth muscle
Muscle tissue in vessels and organs
Nonstriated
Appears smooth
Involuntary
Nervous tissue
Communication among body systems
* Coordination of systemic activities
* Brain, spinal cord, nerves
Neuron
transmit signals
dendrites, axons and cell bodies
neuroglia
support and protect neurons
Epithelial tissue
Coverings, linings and glands
Cells packed tightly
Reproduce rapidly
Avascular
Apical surface and basement membrane
Functions of epithelial tissues
Protection
Absorption
Filtration
Secretion
Classifications of epithelial tissue
Squamous
Cuboidal
Columnar
Transitional
Layers of epi tissue
simple, stratified, psuedostrat
Simple squamous
One layer, flat, thin barrier
Allows rapid movement of molecules across membrane
Simple cuboidal
One layer
cube shaped
secretion
mostly glandular
simple columnar
one layer
tall and narrow for absorption
can be ciliated (respiratory) or non-ciliated (digestive)
Pseudostratified Columnar Epithelium
One layer but looks like more
Large passageways of respiratory tract
Keratinized Stratified Squamous Epithelium
skin
Non-Keratinized Stratified Squamous Epithelium
mouth, vagina, throat, anus
Stratified Cuboidal Epithelium
Forms ducts of exocrine glands
Secretion
Transitional Epithelium
Lining of urinary bladder and ureters
Cells change shape as bladder fills/empties
stretchy
Endocrine glands
“ductless”
Secrete hormones into blood
Exocrine
secrete directly into skin
Function of connective tissue
Physical protection
Support and framework
Binding of structures
Storage
Transport
Immunity
Connective tissue
ground substance comprised of water and chemicals
resident and wandering cells
contain proteins collagen, elastin and reticular
Resident cells
Housed inside the CT
Fibroblasts, Adipocytes, Mesenchymal, Fixed macrophages
Collagen
Primary building block protein for skin, bone, tendons. ligaments and other connective tissues
Elastin
One of the most abundant proteins in the body. It is stretchy but very strong.
Reticular
thin delicate supporting proteins
Ground substance
Viscous in blood, semisolid in cartilage and solid in bone
Loose ct
Areolar: packing
Reticular: beams
Adipose: energy
Dense ct
Regular:rope
irregular:burlap sack
elastic:spring
fluid ct
blood and lymph
cartilage types
hyaline, elastic, fibrocartilage
hyaline cartilage
helps your bones move smoothly past each other in your joints. It’s flexible but strong enough to help your joints hold their shape.
Slippery
Elastic cartilage
a type of cartilage that provides both strength and elasticity to certain parts of the body, such as the ears. Allows stuff to maintain original shape when altered
Fibrocartilage
tough, dense, composed of thick collagen fibers; inflexable
Scurvy
Extreme vitamin D deficiency
Vitamin D essential for healthy collagen
Marfan syndrome
- Rare genetic disease of CT
- Symptoms:
Abnormally long fingers, toes, limbs
Malformation of thoracic cage, vertebral column
Easily dislocated joints, resulting from weak ligaments,
tendons, and joint capsules
Weakness in aorta and abnormal heart valves
Slipped lens of the eye - Often death before age 50 due to cardiovascular problems
- Early diagnosis/medical management allows long life span
Atrophy
decrease in cell # or size
Hyperplasia
increase in number of cells; precursor to cancer
Dysplasia
growth of abnormal cells; still reversible
Neoplasia
tissue growth out of control; tumor develops
-benign: doesnt spread
-Malignant: does spread (bad)
Necrosis
tissue death
Cutaneous membrane
Lines top layer of skin
Mucous membrane
Line organs and passageways that open to external environment
Respiratory, reproductive, urinary, digestive systems
Serous membrane
double layered lining of moving organs; prevents friction
visceral layer of serous membrane
attached to the organ(s)
parietal layer of serous membrane
attached to the wall of the cavity