Epithelial and Connective Tissues

Comprehensive set of practice flashcards covering epithelial tissue, connective tissue, cellular components, matrix fibers, and body membranes.

What is histology defined as?

Histology is the study of tissues.

What are the four primary types of tissues and their main functions?

Epithelial (covering), Connective (support), Muscle (movement), and Nerve (communication/control).

What are the main characteristics of epithelial tissue?

Lines a space, consists mostly of cells with junctions, avascular, innervated, possesses polarity, and capable of fast regeneration.

What are the primary functions of epithelial tissue?

Protection, secretion, absorption, and distention.

What are the key characteristics and functions of connective tissue?

Characteristics: found everywhere, originates from mesenchyme, variable vascularity, and contains a nonliving matrix. Functions: binding and support, protection, insulation, and transport (blood).

How are epithelia classified based on layer arrangement in this diagram?

Simple epithelium consists of a single layer of cells attached to a basal surface, whereas stratified epithelium consists of multiple cell layers.

What three cell shapes are used to classify epithelial tissue, as illustrated below?

Squamous (flattened), Cuboidal (cube-like), and Columnar (tall/column-shaped).

Which type of epithelial tissue is depicted in this microscopic view?

Simple squamous epithelium.

What specific epithelial tissue type is shown in this micrograph?

Simple cuboidal epithelium.

Identify the epithelial tissue type shown in this microscopic section.

Simple columnar epithelium.

What epithelial tissue type is displayed in this micrograph?

Pseudostratified ciliated columnar epithelium.

Identify this epithelial tissue type shown in the image.

Stratified squamous epithelium.

What junction structure is highlighted in this magnified stratified squamous epithelium section?

Desmosomes.

Which epithelial tissue type is shown in this micrograph?

Transitional epithelium.

What is a gland, and how do endocrine and exocrine glands differ?

A gland is one or more cells that makes and secretes an aqueous or oily fluid. Endocrine glands secrete internally into blood or extracellular space (e.g., hormones, steroids, proteins). Exocrine glands secrete externally onto body surfaces (e.g., mucus, sweat, oil, salivary glands) and are more numerous.

What tissue serves as the common tissue of origin for all connective tissues?

Mesenchyme.

What are the components of the extracellular matrix in connective tissue?

Ground substance (unstructured material that fills the space between cells) and fibers (collagen, elastic, or reticular).

What are the functional properties of collagen, elastic, and reticular fibers?

Collagen fibers are tough and resist longitudinal ("pulling") stress; elastic fibers are rubber-band like; reticular fibers are branched collagenous fibers that support organs and blood vessels.

What primary cell types are found in Connective tissue proper, Cartilage, Bone, and Blood?

Connective tissue proper: fibroblast. Cartilage: chondrocyte/blast. Bone: osteocyte/blast/clast. Blood: stem cells and migrating cells (RBCs and WBCs).

What is the main distinction between loose connective tissue and dense connective tissue?

Fiber concentration: loose connective tissue has less fibers per area, whereas dense connective tissue has more fibers per area.

Identify the loose connective tissue type shown in this micrograph.

Areolar loose connective tissue.

What specific loose connective tissue is depicted here?

Adipose loose connective tissue.

Identify this subclass of loose connective tissue.

Reticular loose connective tissue.

What type of dense connective tissue is featured in this micrograph?

Dense regular connective tissue.

Which dense connective tissue subclass is shown here?

Dense irregular connective tissue.

Identify the connective tissue proper subclass displayed in this section.

Elastic connective tissue.

Identify this specific cartilage tissue.

Hyaline cartilage.

What type of cartilage is shown in this micrograph?

Elastic cartilage.

Identify the type of cartilage shown in this image.

Fibrocartilage.

What is the cutaneous membrane?

The cutaneous membrane is the skin, which is a combination of epithelial and connective tissues.

What layers of skin are labeled in this histological section?

Epidermis and Dermis (containing the Papillary layer and Reticular layer).

How do mucous membranes and serous membranes differ in location?

Mucous membranes line body cavities open to the exterior (e.g., digestive and respiratory tracts). Serous membranes are moist membranes found in closed ventral body cavities.

Where are mucous membranes located in the body, as shown in this diagram?

Mucosa of nasal cavity, mucosa of mouth, esophagus lining, and mucosa of lung bronchi.