Chapter 4.2: Tissues

Squamous Thin and flat Nucleus in the thickest part of the cell

Cell Shapes

Figure 4.4

Cuboidal Square

Cell Shapes cont…

Figure 4.4

Columnar Rectangular

Cell Shapes cont…

Figure 4.4

Protected regions where absorption takes place

Ex: Kidneys, Lungs, Heart

Simple Squamous Epithelium

Figure 4.4a

Limited protection where absorption/secretion happens

Ex: Pancreas, Salivary Glands

Simple Cuboidal Epithelium

Figure 4.4b

Some protection, absorb, secrete Ex: Stomach, Intestines

Simple Columnar Epithelium

Figure 4.4c

All cells touch basement membrane Nuclei at different places Looks layered Have cilia Ex: Nasal cavity, Trachea, Bronchi

Pseudostratified Epithelium

Figure 4.5a

Able to stretch Contain more than one shape of cells Ex: Bladder

Transitional Epithelium

Figure 4.5b

Where severe stess happens Surface of skin

Stratified Squamous Epithelium

Figure 4.5c

Mode of Secretion Merocrine Glands Produces mucus Lubricates, Barrier, Perspiration

Glandular Epithelium

Figure 4.6a

Apocrine Glands Milk production Thicker, milkier sweat

Modes of secretion cont…

Figure 4.6b

Holocrine Glands Skin oils Waxy coating on hair

Modes of Secretion cont…

Figure 4.6c

Serous—water containing enzymes Mucous—thick, slippery mucus Mixed—produces both

Types of Secretions

Figure 4.6aa