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Tissues - Histology
| Term | Definition |
|---|---|
| Cells in connective tissue proper | Mast - stem from WBC they cause inflammation and prevent clotting to create an environment disease cannot live in Macrophages - Stationary or mobile, engulfs foreign substances Fibroblasts - build fibers rapidly and aids injury |
| Fibers in connective tissue proper | Collagen - thick, strong Elastic - stretchy, can recoil Reticular - has collagen fibers but provides give, branchy |
| Connective tissue proper is made of what | Fibers, cells, ground substance |
| What is epithelial used for | Boundaries ex. skin and digestive/hollow organs |
| Epithelial cell arangements | simple, stratified, pseudostratified, transitional |
| Epithelial cell shapes | squamous, cuboidal, columnar |
| General categories of tissues | Epithelial, Connective, Muscle, Nervous |
| Types of loose tissue in connective tissue proper | Areolar - thin, delicate tissue that binds skin to muscles and bones Adipose - fat: white fat and brown fat Reticular - branchy and provides framework for the organs |
| Types of dense tissue in connective tissue proper | Dense regular tissue - strong, parallel packed strands of collagen fibers - tendons and ligaments Dense irregular tissue - thicker, all over the place strands of collagen fibers - can withstand pull and pressure from different directions |
| Types of connective (other) tissues | Blood, Cartilage, Bone |
| Components of Blood | WBC, RBC, Platelets, Plasma |
| Types of cartilage | Hyaline, elastic, fibrocartilage |
| Hyaline cartilage | soft cartilage with structure and is the most abundant. Found in the nose |
| Elastic cartilage | softer more bendy cartilage. found in ears |
| Fibrocartilage | really dense. shock absorbing found in the vertebraes |
| What does cartilage look like under microscope | stained glass w/ chondrocytes inside lacuna |
| Two types of bone | spongey and compact |
| components of spongey bone | osteoblasts - building bone cells osteoclasts - dissolving tissue and rebuilding |
| components of compact bone | osteoblasts - building bone cells osteocytes - mature bone cells all of this plus matrix makes a osteon which looks like a tree ring |
| three types of muscle tissue | skeletal, cardiac, smooth |
| characteristics of skeletal muscle tissue | voluntary, has multiple nuclei, striated, connected to bones and provides movement |
| characteristics of smooth muscle tissue | involuntary, has spindle fibers, creates the linings of hollow organs |
| characteristics of cardiac muscle tissue | heart, striated with intercalated discs, connected by gap functions |
| parts of nervous tissue | neurons and neuroglia |
| what is neurons | neurons sense all type of stimulus and communicate messages from the brain through the spinal cord and to the extremities |
| parts of a neuron | the cell body - making the decisions and holds nucleus and cell matter axon - sending the signals out dendrite - receiving signals |
| what is neuroglia | this is the supporting and protecting matter that is in between and around neurons. This keeps the space clean, assists in communication, and helps hold the cells together. Nerve glue |
| 4 types of membrane | 3 types are epithelial and 1 is only connective 3 - mucous, serous, and cutaneous mucous - holes going outside serous - holes only inside cutaneous - skin 1 - synovial - lines joints |
| 3 types of junction | gap - tubules allows for communication and shared nutrients tight - sewn together, water tight, desmosomes - spot welding, firm but flexible |
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