Chapter 5 Lab Vocab Flashcards
Extracellular Matrix
A part of all connective tissues. A large network of proteins and other molecules that surround, support, and give structure to cells and tissues in the body.
Areolar Connective Tissue
A tissue found throughout the body underlying epithelial tissue, surrounding organs, and wrapped around blood vessels and nerves.
Fibroblast
The predominant cell type in areolar tissue. Secretes fibers into the extracellular matrix.
Macrophage
A type of white blood cell that surrounds and kills microorganisms, removes dead cells, and stimulates the action of other immune system cells.
Mast Cell
An important cell in the body that plays an important role in how the immune system responds to certain bacteria and parasites and they help control other types of immune responses
Collagen Fiber
Fibers that provide strength in the matrix of the areolar connective tissue
Elastic Fiber
Fibers that can flex and recoil in the matrix of the areolar connective tissue
Reticular Fiber
Fibers that may help connect the tissue to organs or to other types of tissue in the matrix of the areolar connective tissue
Adipose Tissue
Tissue that is found throughout the body, even in bones that is primarily made of adipocytes.
Adipocyte
Stores lipids via a lipid droplet
Lipid Droplet
A structure inside each adipocyte that fills with fat and pushes the cell’s nucleus to the edge of the cell.
Dense Regular Connective Tissue
Composed mainly of tightly packed collagen fibers with little ground substance and few cells. Collagen fibers are aligned in the same direction. Provides great strength when pulled along direction fibers are aligned.
Tendon
Mainly composed of dense regular connective tissue. Connects muscles to bones
Ligament
Mainly composed of dense regular connective tissue. Connects bones to other bones
Dense Irregular Connective Tissue
Connective tissue which is similar in structure to dense regular connective tissue, but collage fibers are arranged in a seemingly random, irregular manner. Able to provide strength and support in all directions and has a more extensive blood supply. Found in the dermis of the skin. And main ingredient in epimysium, epineurium, and periosteum.
Reticular Layer
The deeper majority of the dermis which is made of dense irregular connective tissue.
Papillary Layer
The thinner more superficial layer of the dermis which is made of areolar connective tissue.
Dermal Papillae
Bumps that form the wavy border between the dermis and the epidermis, particularly in thick skin locking the layers together. Increase surface area between layers for better connection.
