What Can I See??

Marshelle, Courtney, Nicole, and Madison

Epithelial Tissue-Epithelial tissue covers the whole surface of the body. It is made up of cells closely packed and ranged in one or more layers. This tissue is specialized to form the covering or lining of all internal and external body surfaces. (9)

Simple Squamous

Simple Squamous-Simple squamous epithelial cells are thin and flat (the thinnest of all epithelial cell-types), which allows them to have a large surface area. As a simple type of epithelium, simple squamous epithelium is one cell-layer thick, and thus every cell of the tissue comes in direct contact with the basement membrane. (8)

Stratified Squamous

Stratified Squamous- Where body linings have to withstand wear and tear, the epithelia are composed of several layers of cells and are then called compound or stratified epithelium. The top cells are flat and scaly. (8)

Transitional Squamous

Simple Columnar-Goblet cells, which are unicellular glands, are found between the columnar epithelial cells of the duodenum. They secrete mucus or slime, a lubricating substance which keeps the surface smooth. They occur in one or more layers, also they are elongated or column shaped. (8)

Stratified Columnar

Stratified Columnar –rare, column-shaped, secretion and protection, often found between simple columnar epithelia and stratified squamous epithelia, found near salivary glands - cell lining protects the salivary duct, goblet cells found between the cells, found in vas deferens where it protects and aids in secretion of glands, intestinal lining - ciliated to help move nutrients and increase absorption, also protects against pathogens/bacteria, also form layers in ocular conjunctiva and the linings of the pharynx, anus, uterus, urethra. (8)

Pseudostratified (1) & (Page. 136-137)

Epithelium consisting of a single layer of cells but having the appearance of multiple layers.

Location: the lining of the respiratory passages

Function: secretion

Key Features: staggered nuclei; may have goblet cells and cilia; little matrix

Simple Cuboidal (1) & (Page. 128)-consists of a single layer of cells squarish in profile. The nucleus of each cell is round and centrally located.

Locations: bronchioles; kidney tubules; thyroid and other glands

Stratified Cuboidal (1) & (Page. 130)

Locations: limited, but can be found lining ovarian follicles and the lining of some ducts and glands

Functions: lining of ducts

Key Features: cuboidal cells near free surface; usually two layers of cells

Connective Tissue (1) & (Page. 132)

Locations: multiple locations including beneath epithelium and mesenteriesFunctions: provides nutrients and support to other tissue types; immune functionsKey Features: loose appearance, multiple fiber and cell types

Loose Ordinary Fibrous (1) & (Page. 131)

Locations: tendons; ligamentsFunction: strong supportKey Features: one fiber type in parallel arrangement; thin fibroblasts; minimal ground substance

Adipose (1) & (Page. 136-137)

• consists of adipocytes, which store fat droplets

• Locations: subcutaneous region, bone marrow, and mesenteries

• Functions: lipid storage; thermoregulation; protection

Reticular (1) & (Page. 136)

• consists of branching fibers and fibroblasts

• Locations: stroma of spleen, liver, lymph nodes and thymus

• Function: support

Dense Regular Fibrous (1) & (Page. 137-140)

• consists of closely packed parallel collagen fibers and fibroblasts interspersed between the fibers

• Locations: tendons, ligaments

• Function: strong support

Dense Irregular Fibrous (1) & (Page. 136 - 139)

• the collagen fibers do not exhibit a consistent pattern

• Locations: dermis; sheaths around bones, nerves and cartilages

• Function: strong support

Bone (1) & (Page. 137 - 140)

• dense calcified tissue with no spaces visible to the naked eye

• Locations: outer surface and shaft of bone

• Function: support

Hyaline cartilage (1) & (Page. 141)

• contains chondrocytes in lacunae and a matrix of fine collagen fibers that are not visible

• Locations: subcutaneous region, bone marrow, and mesenteries

• Functions: lipid storage; thermoregulation; protection

Fibrocartilage (1) & (Page. 141)

• consists of parallel fibers of collagen fibers with chondrocytes in lacunae interspersed

• Locations: intervertebral discs; pubic symphysis

• Function: firm support

Elastic Cartilage (1) & (Page. 140 - 141)

Contains few collagen fibers but large numbers of very fine elastic fibers

that give the matrix material a high degree of

flexibility. Found in the external ear, larynx, and in

the voice box. (1) & (Page. 141)

Blood (1) & (Page. 141-143)

Exists in a liquid state and contains neither ground

substance nor fibers. This makes blood the most unusual

connective tissue. Blood is divided into 3 classes: erythrocytes (red blood cells), leukocytes (white

blood cells), thrombocytes (platelets). Blood maintains body temperature, regulates the pH of

body functions, movement of oxygen and carbon dioxide,

nutrients, and waste products. (1) & (Page. 142)

Muscle (1) & (Page. 143)

• There are three different types of muscle tissue: skeletal muscle, smooth muscle, and cardiac muscle. Each type of muscle type tells its location in the body.

Skeletal Muscle (1) & (Page. 143-144)

The Skeletal Muscle is often called striated voluntary muscle.

Composes muscles attached to bones; these

are organs that we think of as our muscles. They have a threadlike appearance,

many cross striations, many nuclei per cell, and

long, and narrow.

(1) & (Page. 144)

Smooth Muscle (1) & (Page. 143-144)

Also called nonstriated involuntary. It is found in the walls of the viscera , stomach, intestines, and

blood vessels. Long, narrow fibers but not as

long as striated fibers. They only have one nucleus per fiber and are nonstriated or smooth when they are

looked at.

(1) & (Page. 144)

Cardiac Muscle (1) & (Page. 143-144)

Makes up the walls of the heart. These muscles have

crossed striations and unique dark bands. They are incomplete cells that branch into each other to

form a big continuous mass od cytoplasm.

(1) & (Page. 145)

Nervous (1) & (Page. 145)

More developed excitability and conductivity

characteristics than any other type of tissue. The

actual nerve tissue is ectodermal in origin and

consists of two basic kinds of cells: nerve cells, or neurons. These are the conducting units of the

nervous system. (1) & (Page. 146)