Week 2 Lab Ch 6 Histology Flashcards
Name three functions of the epithelial tissue
Covers Lining (respiratory tract) Secretes (stomach lining) Absorbs (intestine) Forms glands ( sweat glands)
Name the 4 types of tissue
Epithelial connective muscle nervous
Epithelial cells are open to
Free space
Epithelial tissue is
Avascular
Epithelial cells are able to
Regenerate
Epithelial cells are attached to
Basement membrane
Name the three types of epithelial tissue
Squamous cuboidal columnar
If epithelial tissue is simple how many layers does it have
One layer
If epithelial tissue is stratified how many layers does it have
More then one layer
These cells look multilayered but they are just one cell thick squished together
Pseudostratified columnar
Name an example of pseudo stratified columnar
Goblet cells
Where are goblet cells and what do they produce
In trachea and produce mucous
This type of epithelial tissue looks like all different types of cells mixed together for the purpose of stretching
Transitional
Give an example of transitional epithelial tissue
Stratified squamous in bladder
Type of gland where secretions are released into the blood stream
Endocrine
Give an example of an endocrine secretion
Hormones
This type of gland secretes through a duct to a body cavity or onto the surface
Exocrine
Give an example of an exocrine secretion
Sweat
Most abundant tissue type
Connective
Give 5 functions of the connective tissue
Bone Blood Fat Cartilage Ligaments Collagen Support Protects Blood transport Stores energy Insulates Protects
Connective tissue is derived from
Mesenchyme
Connective tissue is all vascular except
Tendons and ligaments
Connective tissue cells are surrounded by
Matrix
Name the 4 connective tissue proper
Loose areolar
Adipose
Reticular
Dense regular
Loose areolar is
Gel like
Adipose is
Fat
Reticular tissue is found in
Organs that filter lymph and blood example spleen and lymph nodes
Dense regular tissue are
Tendons and ligaments ( very tough and strong straight lines )
Name the 4 classifications of connective tissue
Connective tissue proper
Bone
Cartilage
Blood
What makes up blood
White and red blood cells And plasma ( liquid matrix)
What is the functions of muscle tissue
Movement
Name the three types of muscle tissue
Skeletal
Smooth
Cardiac
What are some characteristics of skeletal muscle
Voluntary connected at bone and multinucleated ( striped/ striated ) (bacon)
What are some characteristics of cardiac muscle
Involuntary intercalated disks striations
Looks branched and striped
What are intercalated disks
Allows heart to beat as 1 unit connects muscles
What are some characteristics of smooth muscle
Involuntary internal organs not striated
What is the function of nervous tissue
Generates electrical impulses to conduct information throughout the body
Name the two types of nervous cells
Neuron and neuroglial
Neuron big blob with tail glial cells tiny dots
What is the purpose of neurons
Conducts impulses
What is the purpose of neuroglial cells
Support neurons
Name the two structures of skin
Epidermis and dermis
What is the epidermis
Superficial layer (epithelial tissue 5layers )
What is the dermis
Deeper connective tissue
Glands nerves blood vessels
What are the five layers of the epidermis from deepest to top
Stratum basale Stratum spinosum Stratum granulosum Stratum lucidum Stratum corneum
Describe the stratum basale
Deepest layer of epidermis
Mitosis (single layer of cells)
Melanocytes
What are melanocytes
Produce melanin- color pigment
On a slide they done have color only their nucleus will have color the rest will be clear
Describe the stratum spinosum
2 layer of epidermis
Spiny filaments
Keratinocytes
What is keratinocytes
Produces keratin (elastic strong and water proof) protective protein found in all 5 layers
Describe stratum granulosum
3 layer of epidermis cells contain abundant keratin granules, 2-3 layers of cells, very dark in color, are dying( have lots of keratin)
Describe stratum lucidum
4 layer of epidermis single layer of transparent cells ( sometimes there depends on how thick the skin is- hands and feet)
Describe stratum corneum
Superficial (top layer) of epidermis, keratinized and dead
What are the two layers of the dermis
Papillary and reticular
Describe papillary layer
Top layer of dermis, had dermal papillae that extend into the epidermis
Describe reticular layer
Bottom layer of dermis
Contains blood vessels, nerves and glands
Name the four structures found in the skin
Hair follicle
Arrector pili muscle
Cutaneous glands
Sensory receptors
What is the Arrector pili muscle
Smooth muscle that surrounds hair and causes goose bumps
What are the two types of cutaneous glands?
Sebaceous and sweat
What is produced by the sebaceous gland
Hair grease( sebum) Looks like big roundish ball of cells near hair follicle
What are the two types of sweat glands
Eccrine and apocrine
What is produced by the eccrine gland
Type of sweat gland (cutaneous) produces clear perspiration onto surface of skin
They are two cuboidal layered holes small lumen
What is produced by apocrine glands
Types of cutaneous sweat glands that forms milky scented secretions. Empties into hair follicle ( axillary/ genitals) produces the smell.
Big lumen single layered
Name two types of sensory receptors
Meissner’s corpuscle and pacinian corpuscle
What is the meissner’s corpuscle
Sensory receptor found in the dermis but at it’s surface- soft touch receptor
(Looks like bean with zigzag in middle)
What is the pacinian corpuscle
Sensory receptor for deep pressure found deep in dermis
Looks like an onions
