cha 4 ana & phs

Tissues

Collections of similar cells and the extracellular substances surrounding them.

Histology

The microscopic study of tissues.

Epithelial Tissue Functions

Protect underlying structures, act as barriers, permit some substances to pass through, secrete substances, and absorb substances.

Classification of Epithelial Tissues

Includes simple (single layer), stratified (two or more layers), and pseudostratified (appears stratified) epithelium; cell types include squamous (flat), cuboidal, and columnar.

Exocrine vs. Endocrine Glands

Exocrine glands secrete through ducts, whereas endocrine glands release hormones directly into the blood.

Connective Tissue

Distinguished by its extracellular matrix, which encloses, separates, and supports different tissues and organs.

Types of Muscle Tissue

Includes skeletal (voluntary), cardiac (involuntary), and smooth (involuntary) muscle.

Nervous Tissue

Composed of neurons that conduct electrical impulses and glial cells that support neurons.

Mucous Membranes

Composed of epithelial cells and line cavities that open to the outside, often containing mucous glands.

Inflammation Symptoms

Five symptoms include redness, heat, swelling, pain, and disturbed function.

Tissue Repair Types

Occurs by regeneration of labile and stable cells or replacement by permanent cells, with processes like primary and secondary union.