Midterm Flashcards
Where is Superficial Fascia / subcutaneous found?
Between skin and underlying organs
What is superficial fascia composed of
Areolar and adipose tissue
Where is subserous fascia found
Between serous membranes and deep fascia
What is subserous fascia composed of
areolar tissue
Function of deep fascia
forms strong, fibrous internal framework
What is deep fascia composed of
Dense irregular CT
Where is deep fascia found
bound to ligaments, tendons, capsules
Sarcoplasm
cytoplasm of striated muscle cells
Sarcolemma
cell membrane of a muscle cell
Role of melanocytes in the epidermis
produce pigment by absorbing UV
Ligamentum Nuchae
large ligament on back on neck, covers spines C1-6
How does glenoid labrum contribute to stability of shoulder
acts as suction, deepens articulating surface for cavity to meet head of humerus, more stability
Where can you find simple squamous epithelial tissue?
-blood vessels, alveoli, high permeability need to control, quick O2 transfer
Where can you find simple cuboidal epithelial
absorption, secretion, excretion sites. Ovaries, kidney ducts, thyroid gland, sweat glands
where can you find simple columnar epithelial
Most organs of the digestive tract (stomach, intestines, uterus)
Where can you find stratified squamous epithelial
Places of high abrasion, protection (anus, mouth)
Where can you find stratified cuboidal epithelial
Secretion sites. Some sweat glands
Where can you find stratified columnar
Rare. Mammary glands, secretion sites
Exocrine gland
Secretions are released onto an epithelial surface outside body thru a duct (eg. sweat gland, mammary gland)
Endocrine gland
Ductless. Release their hormones by exocytosis directly into interstitial fluid (blood stream)
3 types of secretions done by glandular epithelia
Serous, Mucous, Mixed exocrine
Serous secretion
watery substance, eg. saliva
mixed exocrine secretion
mixture of cells that secrete serous and mucous secretions
3 types of exocrine/gland cell secretions
Eccrine, Apocrine, Holocrine
Eccrine secretion
Gland cell releases thru exocytosis
Apocrine secretion
Released by shedding of cytoplasm (mammary gland)
Holocrine secretion
entire cell bursts releasing secretion (acne, sebaceous gland)
Main components of CT
specialized cells (fibroblasts, chondroblasts, osteoblasts), protein fibres (collagen, reticular fibres, elastic fibres), ground substance
Fibroblasts
produce CT fibers (collagen, reticular, elastic) and extracellular matrix
Chondroblasts
Produce cartilage components
Osteoblasts
Bone-forming cells
What are fixed cells
Fibroblasts, fibrocytes, adipocytes, etc. stuck in place
What are wandering cells
Float in and out, all immune cells (e.g.. macrophages, mast cells, lymphocytes)
Fixed Macrophages
phagocytize pathogens and damaged cells
Mesenchymal cells
CT stem cells that can differentiate into other cell types
Melanocytes
Provide melanin for pigmentation in skin
Free macrophages
phagocytic cells that get rid of dying, unwanted cells. Act like army when there is inflammation
Mast cells
Wandering cell, stimulate inflammatory response, attracts free macrophages and neutrophils
Lymphocytes
wandering cell, part of immune response, memory component
Neutrophils
wandering, small phagocytic cells that assist during infection and tissue damage (1st to arrive to virus)
3 types of Loose CT
Areolar, Adipose, Reticular tissue
Protein fibers
Collagen, reticulin, elastic
Functions of loose CT
Packing material, provides cushioning, stores energy, route for diffusion
Function and Location of Loose CT Areolar
Supports and cushions organs. Found where support is needed around dermis, b/w muscles, around blood vessels
Function and Location of Loose CT Adipose
Stores energy, absorbs shock, insulates. Subcutaneous fat, visceral fat and intermuscular
Function and Location of Loose CT Reticular
Supporting framework for organs (scaffolding). Liver, kidney, spleen, lymph nodes, bone marrow
3 types of Dense CT
Dense regular, Dense irregular, Elastic
Function and Location of Dense Regular CT
Primary collagen, orderly, firm attachments, stabilize. Tendons, ligaments, connecting bone to bone, aponeuroses
Function and Location of Dense Irregular CT
Primarily collagen fibers, all different directions, helps to prevent over expansion of organs. Found in dermis of skin, joint and organ capsules, periosteum
Dense Elastic CT
Rare. Primarily elastin. Looks orderly like dense regular CT. Around blood vessels (stretch and return to shape), help in maintaining BP
2 types of Supporting CT
Cartilage and Bone
Is cartilage avascular
Yes
Cartilage
Collagen found throughout, repair is very limited bc avascular
Perichondrium
separates cartilage from other tissues, “around” “cartilage”, has blood supply
3 types of cartilage
Hyaline, Elastic, Fibrocartilage
Cartilage grows by:
Appositional or Inerstitial growth
Function and Location of Hyaline
Strong, flexible, reduces friction b/w bones. Found b/w ribs & sternum, covering articulating bone surfaces (synovial joints), supports larynx, trachea
Does hyaline in joints have a perichondrium lining?
No. So it gets its nutrition from synovial fluid
Function and location of elastic cartilage
Supports and tolerates distortion, memory component. Found external flap of ear, epiglottis, auditory canal
Function and location of fibrous cartilage
Resists compression, prevents bone to bone contact, limits movement. Found in big areas that need support, pads of knee, b/w pubic bones of pelvis, intervertebral discs
Lacunae
found within bone & cartilage, chondrocytes/osteocytes reside in them. Help with growth
Osteon
Concentric layers that form around central canal
Canaliculi
Canals b/w lacunae of bones
Is bone vascular
Yes, it has blood vessels. Tissue can repair easier and newly made RBC, WBC, and platelets in bone marrow can get out
Is bone vascular
Yes, it has blood vessels. Tissue can repair easier and newly made RBC, WBC, and platelets in bone marrow can get out
2 types of bone
Compact and spongy (trabecular)
Compact bone
blood vessels trapped within matrix
Spongy bone
doesn’t have blood vessels in matrix, tends to be more internal, reduces weight
Osteoblasts
Bone-forming cells, immature, lay down new bone
Osteocytes
bone maintenance
Osteoclasts
“chew up” old bone
4 types of epithelial membranes
Mucous, Serous, Synovial, Cutaneous
Mucous membrane
coated w/ secretions from mucous glands. Line most of dig tract, portions of urinary. Usually columnar or cuboidal
Serous membrane
Mesothelium (lining of body cavities: pleura, pericardium, peritoneum) & areolar CT. Has serous fluid between cavity and oral lining
Synovial membrane
Areolar tissue and superficial layer of squamous, cuboidal. Has synovial fluid which lubricates cartilage in joints
Cutaneous Membrane
Epidermis, dermis. 1st line of defence against pathogens. **keratinized stratified squamous ET with areolar loose CT and then Dense irregular CT
3 types of muscle cells
Skeletal, cardiac, smooth
the ____ the muscle fibre, the more ___ the individual
thicker, active
Cardiac muscle
mono nucleated, striated, incapable of repair
What kind of cells are cardiac muscles connected by
Intercalated discs, which creates branching b/w cardiac muscle fibres
Where is smooth muscle found
Base of hair follicles, walls of blood vessels, lining the urinary bladder (sphincters)
Can smooth muscle regenerate
Yes, it is capable of cell reproduction
Smooth muscle
small w/ tapered ends, 1 nucleus in middle, not striated
What does the cutaneous membrane consist of
Dermis & epidermis
2 accessory glands
Sebaceous and sweat glands
Sebaceous gland
secrets sebum which coats hair shaft & epidermis, inhibits growth of bacteria, exocrine gland
Sweat gland
can be apocrine (groin, nipples) or eccrine (thin secretion)
2 forms of ossification
Intramembraneous and Endochondral
Intramembraneous ossification
stem cells differentiate to form osteoblasts, osteoblasts secrete a matrix and get trapped, turn to osteocytes, blood vessels get trapped, bony plates fuse together`
What do the external intercostal muscles do
elevate ribs
What do the internal intercostal muscles do
depress ribs
Primary muscles of breathing
Diaphragm, external intercostal muscles
Muscles used for inhaling
Sternocleidomastoid, scalene muscles, pectoralis minor, serratus anterior
Muscles used for expiration
internal intercostal muscles, transversus thoracis muscle
Pectoralis major’s antagonist (flexion, add)
Deltoid
Serratus anterior antagonist (protracts scapula)
Rhomboid major and minor
Trapezius antagonists
Serratus anterior, Latissimus dorsi
Where does biceps brachii originate
coracoid process of scapula
Where does biceps brachii insert
radial tuberosity on radius bone
3 joints in elbow
Proximal Radioulnar joint, humeroradial joint, Humeroulnar joint
Rotator cuff muscles
Supraspinatus, infraspinatus, Teres Minor. Subscapularis
Joints in forearm
Proximal radioulnar, middle radioulnar, distal radioulnar