The tops of the cells have microvilli that face the cavity from which substances will be absorbed. Every organ you can think of in an animal body, including your own, consists of tissues made up of specialised cells.
Simple epithelial tissue — the cells are organised in one layer.
The basal lamina is composed of collagen and laminin proteins, as well as various other macromolecules. In the nervous system, the chemical messengers are neurotransmitters sent straight from one cell to another across a tiny gap.
The individual fibers are connected by structures called intercalated disks, which allow them to contract in sync.
Cain, Steven A. Human Impact on the Environment. Last modified May 18, 2016. All Rights Reserved. Body structure and homeostasis review. Smooth muscles — th ese are composed of unstriated, involuntary muscle fibers.
Tissues are communities of cells that have functions beyond what any single cell type could accomplish. Cells make up tissues , tissues make up organs , and organs make up organ systems.
Erin Schreiner is a freelance writer and teacher who holds a bachelor's degree from Bowling Green State University. Another example is the respiratory system, which brings oxygen into the body and gets rid of carbon dioxide.
How, then, does the body nourish its cells and keep itself running? Complex tissues Examples of complex tissues in plants are vascular tissues and conductive tissues.
Biology 102: Pearson, 2012. Simple columnar tissue: Animal primary tissues: On this side of the endothelium, adhesive junctions attach cells to the ECM. Mowshowitz, Deborah. Last modified June 6, 2016.
Creature Cast. Pearson, 2011. Transcription factors — proteins that regulate which genes are transcribed in a cell — appear to be essential to determining the pathway particular stem cells take as they differentiate.
Stratified squamous tissue: