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# Epithelial Membranes - **LO. To** learn, understand, what epithelial and membranes. - Epithelial Tissue covers the **whole** surface of the body. Made of cells closely packed and arranged in one or more layers. The base is connected to the surrounding or honey comb tissue. - 4 types of tissue in t...

# Epithelial Membranes - **LO. To** learn, understand, what epithelial and membranes. - Epithelial Tissue covers the **whole** surface of the body. Made of cells closely packed and arranged in one or more layers. The base is connected to the surrounding or honey comb tissue. - 4 types of tissue in the body are: - Connective Tissue - Epithelial Tissue - Muscle Tissue - Nervous Tissue - Epithelia are formed of cells that line the cavities in the body and also cover flat surfaces. - Why are epithelial cells different? - **Avascular** - Cappelanies do not reside within epithelial cells tissues. - **Sensory** - Endings of neurons are present within epithelial cell tissues. Perceive external stimuli. - **Gliding** Surface layer - Epithelial cells slough off and glide in order to replace dead cells. Allows the cells to maintain closed barrier to external environment. - **Transitional** - Multi layered able to stretch. Allows urinary bladder to contract or relax without compromising it.