TISSUES NOTES

PART 1

NOTES - TISSUES

• The human body is organized in the following manner:

ATOMS

MOLECULES

CELLS

TISSUES

ORGANS

ORGAN SYSTEMS

ORGANISM (human)

• TISSUE (definition)

• similar cells with the same function

• 4 types of human tissue: I. EPITHELIAL

TISSUEII. CONNECTIVE TISSUEIII. NERVOUS TISSUEIV. MUSCLE TISSUE

I. EPITHELIAL TISSUE• Function: • cover or lining of organs

1. Stratified Squamous Epithelium

• Function: • protection from injury• cells on the bottom are round – they become flat near the top

• Location: • skin

• 3 main types of Epithelial Tissue:

2. Simple Columnar Epithelium

• long rectangles packed close together

Function: • to secrete chemicals & absorb nutrients

Location: • lining of digestive tract (stomach, intestines)

lining of the stomach (columnar epithelium)

3. Ciliated Epithelium (aka: psuedostratified)

• similar to columnar epithelium, but with CILIA

Function: • movement of mucus or egg by action of cilia

Location: • trachea, oviducts (fallopian tubes)

* there are other types of epithelium as well

Tracheal epithelium (ciliated)