Microscopic & Macroscopic Structure Flashcards
What is Histology?
Study of arrangement of tissue samples in a tissue.
Hematoxylin
Dye for staining of negatively charged molecules (for example, DNA). It is positively charged in water because it is basic. Stains DARK BLUE.
Eosin
Dye for staining of positively charged molecules (for example, PROTEIN: histidine, arginine, lysine). It is negatively charged in water because it is acidic. Stains RED.
Yellow Marrow
Part of bone marrow that stores fat and macrophages that clear blood. Not susceptible to radiation. Fills the center area of bones.
Red Marrow
Part of bone marrow that houses stem cells that make all cell components of blood (red, white, platelet). Extremely susceptible to radiation. Located at trabecular/spongy bone regions near the epiphysis (end) of the bones.
Trabecular Bone
Spongy bone, houses red marrow and stem cells. Also called cancellous bone.
Nose, Paranasal Sinuses, Trachea, Bronchi, Bronchiole, Alveolar Duct, Alveoli
Passage of air through respiratory system
Paranasal sinus
air-filled cavity surrounding the nose, four parts: maxillary (around nose), frontal (above eye), ethmoidal (between eyes), sphenoidal sinuses.
Respiratory epithelial mucosa
Located in the lining of the paranasal sinus cavities, larynx, trachea and bronchi. Mucoid secretions moisten air and trap particulates; cilia sweep particulates from airway.
Gastrointestinal tract
Site of a number of cancer, target for dosimetry. Fractal geometry increases surface area for nutrient intake.
Biopsy vs Autopsy
Taking tissue samples from living organisms versus from dead organisms
3 Kinds of Biopsies
Open Biopsy (surgery required), Percutaneous Needle Biopsy (needle takes small sample, can be CT guided), Endoscopic Biopsy (simple insertion of optical scopes such as bronchoscope, colonoscope)
