Lesson 1, Topic 1
In Progress


April 11, 2024


basal    Bottom layer.
benign    A noncancerous condition; not malignant, harmless.
bilirubin    A reddish pigment that results from the breakdown of red blood cells in the liver.
collagen (KAH lah jen)    The most abundant structural protein found in skin and other connective tissues. It provides strength and cushioning to many parts of the body.
cryosurgery    The technique of exposing tissue to extreme cold to produce a well-defined area of cell destruction.
ecchymosis (ek i MOH sis)    Discoloration of the skin caused by the escape of blood into the tissues from ruptured blood vessels; typically caused by bruising.
elastin (ee LAS tin)    A highly elastic protein in connective tissue that allows tissues to resume their shape after stretching or contracting. It is found abundantly in the dermis of the skin.
epithelial cells (ep i THEE lee al)    Form cellular sheets that cover surfaces, both inside and outside the body. Epithelial cells are closely packed, take on different shapes, and strongly stick to each other.
excoriated (ik SKOHR ee ay ted)    To strip off or remove the skin from an area.
glomerulonephritis (gloh mer yuh loh neh FRIE tis)    Kidney disease affecting the capillaries of the nephron (glomeruli); characterized by albuminuria, edema, and hypertension.
hyperplasia (hahy per PLEY zhee uh)    Enlargement due to an abnormal multiplication of cells.
jaundice    A yellow discoloration of the skin and mucous membranes caused by deposits of bile.
leukoderma    Lack of skin pigmentation, especially in patches.
malignant    A descriptive term for things or conditions that threaten life or well-being. Malignant is the opposite of benign.
melanocytes (meh LAN oh sites)    Cells of the stratum germinativum that produce a brownish pigment called melanin. Melanin gives us our skin color.
opaque (oh PAYK)    Not transparent; cloudy or murky.
pathogen    A disease-causing organism.
petechiae (peh TEEK kee ah)    Very small, round hemorrhage in the skin or mucous membrane.
pores    Tiny openings in the surface of the skin that allow gases, liquids, or microscopic particles to pass.
strata    Naturally or artificially formed layers of material, usually multiple layers.
synthesis (SIN theh sis)    Formation of a chemical compound from simpler compounds or elements.