Chapter 4 in our textbook focused on tissues, organs, and organ systems. Surprisingly, there were a number of terms that were unfamiliar to me. Some of them I’d heard before but never knew its true meaning, others I’d never heard before.
Simple Squamous Epithelium: flattened epithelium; This type of sheetlike tissue may be found in the lining of blood vessels or air sacs of lungs.
Simple Cubodial Epithelium: cube-shaped; This type of sheetlike tissue may be found in the glands, ovary surfaces, or iris of the eye.
Simple Columnar Epithelium: elongated; This type of sheetlike tissue may be found in the stomach, intestines, or uterus.
Thoracic Cavity: The thoracic cavity is the cavity in which the heart and lungs reside.
Keratinocytes: These cells may be found in the epidermis, the top layer of skin. Their main function is to create keratin, a water-soluble protein.
Vasodilation and Vasoconstriction: Both terms are affected by the body’s core temperature. Vasodilation occurs when the temperature rises. It allows more blood to flow through the vessels. On the other hand, vasoconstriction occurs when the temperature lowers below the set point and reduces the blood flow by narrowing the walls.