As we age, it takes longer for cuts to heal.  Older people are often cold.  These observations can be explained by the fact that as we age, the effectiveness of homeostatic control mechanisms ________.

means mature; maintains the matrix

A system of interconnected channels called cisternae wrapped in a membrane

The powerhouse, responsible for cellular respiration, makes energy is the 

What are the wavelike projections of the papillary layer that contain capillary loops, free nerve endings, etc?

glands that release their secretions by pinching off part of their cells which become the secretion (armpit sweat glands, mammary glands, wax glands)

Large organic molecules are called ________________.

A distinct structure composed of several types of tissues is a(n)

The movement of materials from an area of high concentration to an area of low concentration until evenly distributed is 

a group of similar cells working together