Ch. 5 Tissues Flashcards
What is histology?
The study of tissue
The tissue of the human body include 4 major types which include..
- Epithelial
- Connective
- Muscle
- Nervous
The function of epithelial tissue is..
Protection, secretion, absorption and excretion
What is the location of epithelial tissue?
The body surface, covering and lining of internal organs, composing of glands
The function of connective tissue is..
Support, fill spaces, produce blood cells
What is the location of connective tissue?
It is widely spread throughout body
The function of muscle tissue is..
Contraction and relaxation (body movement)
What is the location of muscle tissue?
Attached to bones, in the walls of hollow internal organs, heart
The function of nervous tissue is..
To conduct impulses to control and coordinate body activities
What is the location of nervous tissue?
Brain, spinal cord, nerves
Tissue are _______-dimensional structures
three
Micrographs are..
Photos of very thin sections of tissue specimens
Tubular structures can be observed through micrographs, some examples of tubular structures are..
Blood vessels, digestive tract
A cross section is..
A cut across the structure
An oblique section is..
An angular cut through the structure
A longitudinal section is..
A lengthwise cut through the structure (right and left sections)
Circle or ovals indicate ________ or ________ sections
- Cross
- Oblique
Rows of cells with an elongated space between them indicate _________ sections
Longitudinal
Describe epithelial tissues
- Free (apical) surface
- Anchored to connective tissues by a basement membrane
- Tightly packed cells w/ little extracellular–intercellular material
Epithelial tissues are classified by cell ___________ and cell ___________
- Shape
- Layer
The number of layers in epithelial tissues are categorized as..
- Simple (single layer)
- Stratified (many layers)
The cell shapes in epithelial tissues are categorized as..
- Squamous (irregular and flat)
- Cuboidal (cube-shaped cells)
- Columnar (tall and elongated)
Simple squamous epithelium meaning
Single layer of irregular flat cells
Simple squamous epithelium function
- Diffusion (High to low concentration)
- Filtration (Water and dissolved material forced through a membrane from high to low pressure)
Simple squamous epithelium example(s)
- Air sacs of the lungs (respiratory system) in diffusion
- Kidneys (filtration)
Simple cuboidal epithelium meaning
Single layer of cube-shaped cells
Simple cuboidal epithelium function
Protection and secretion forming all glands in the body
Simple cuboidal epithelium can be found..
Surfaces of ovaries
Simple columnar epithelium meaning
Single layer of tall, elongated cells
Simple columnar epithelium function
Protection, secretion, absorption
Columnar epithelium can be categorized into ________ and _________
- Nonciliated (without hairlike projections)
- Ciliated (with hairlike projections)
Simple columnar epithelium example(s)
Lining of uterus, stomach
Pseudostratified columnar epithelium meaning
A single layer of cells that give a false appearance of multiple layers (due to the position of the nucleus)
Pseudostratified columnar epithelium function
Protection, secretion, movement of mucus
Pseudostratified columnar epithelium example(s)
Lining of respiratory passages
Stratified squamous epithelium meaning
Many layers of irregular flat cells
Stratified squamous epithelium function
Protection
Stratified squamous epithelium example(s)
Superficial layer of skin
Stratified cuboidal epithelium meaning
Many layers of cube-shaped cells
Stratified cuboidal epithelium function
Protection
Stratified cuboidal epithelium can be found..
Lining ducts of mammary glands
Stratified columnar epithelium meaning
Many layers of tall, elongated cells
Stratified columnar epithelium function
Protection, secretion
Stratified columnar epithelium can be found
Lining the larger ducts of excretory glands
Transitional epithelium meaning
Cell shape changing (expandable lining)
Transitional epithelium function
Protection, stretchability
Transitional epithelium example(s)
- The urinary bladder (when full it is larger than when empty)
- Pregnancy/birth (uterus contracting)
Two types of glands are..
- Endocrine
- Exocrine
Endocrine glands are..
- Ductless
- Secrete hormones in body fluid
Exocrine glands..
- Contain ducts
- Ex: Sweat gland, salivary gland
All ducts in the body are formed in _____________ tissue
Epithelial
Connective tissue has an abundance of ____________/__________ matrix
- Extracellular
- Intercellular
The main categories of connective tissue are
- Connective tissue proper
- Specialized connective tissue
Connective tissue proper includes..
- Loose connective tissue
- Dense connective tissue
Specialized connective tissue includes..
- Cartilage
- Bone
- Blood
Loose connective tissue..
Contains adipocytes (fat cells)
Loose connective tissue function
Cushions joint, stores energy, insulates body
Loose connective tissue example(s)
Around kidneys
Dense connective tissue..
- Found in tendon (joins muscle to bone)
- Found in ligament (joins bone to bone)
Cartilage..
- Specialized connective tissue containing chondrocytes (cartilage cells)
- Enclosed within a connective tissue covering called the perichondrium
Bone tissue..
- Specialized connective tissue
- Forms sites for muscle attachment
- Contains osteocytes (bone cells)
Bone example(s)
Skull protect brain, Ribs protect the lungs, Pelvic bones protect the reproductive organs
Blood (which is formed in the bones) has two portions, these portions are..
- Plasma
- Formed elements
Plasma..
Liquid portion of blood
Formed elements are categorized into..
- Erythrocytes
- Leukocytes
- Platelets
Erythrocytes..
- Red blood cells
- Function: Carry O2 and nutrients
Leukocytes..
- White blood cells
- Function: Protect against infection, defend (phagocytes)
Platelets..
- Function: Form clots and contains thrombocytes which stop bleeding
What are the types of membranes in the body?
- Serous membrane
- Mucous membrane
- Cutaneous membrane
- Synovial membrane
What are the types of epithelial membranes?
- Serous
- Mucous
- Cutaneous
What are the types of connective tissue membrane?
Synovial
Serous membranes..
Line cavities that have no openings (thoracic cavity, abdominal cavity)
Example of serous membranes in the
Pleura, pericardium, and peritoneum
Mucous membranes..
Secretes mucus and line the systems which have an opening to the exterior
What body systems are associated with mucous membranes?
- (1) Digestive
- (2) Respiratory
- (3) Urinary
- (4) Reproductive
Mucous membranes produce mucus from..
Goblet cells
The cutaneous membrane is the
Skin
The synovial membrane..
Lines the joints
What is the function of the muscle tissues?
Contraction and relaxation
What the the types of muscle tissue?
- (1) Cardiac— Heart muscles (Involuntary)
- (2) Smooth— All the tubular or sac shaped organs in the muscle (Involuntary)
- (3) Skeletal — Muscles attached to the bone (Voluntary)
Cardiac muscle tissue..
- Involuntary— Cannot control
- Found only in the heart
Smooth muscle tissue.. (and examples)
- Involuntary— Cannot control
- Found in all the tubular or sac shaped organs (Hollow internal organs)
EX: Digestive tract, blood vessels, urinary bladder, uterus
Skeletal muscle tissue..
- Voluntary— Can control
- Muscle attached to the bone
Two types of nerve tissue are
- (1) Neurons— Nerve cells send signals
- (2) Neuroglia— Supports and protects the neuron
Neurons..
Nerve cells send signals
Neuroglia..
Supports and protects the neuron