Chapter 5.1-5.3

These flashcards cover key terms and concepts related to the structure and function of various tissue types in human biology.

Types of Tissues

There are four major types of tissues: epithelial, connective, muscle, and nervous.

Epithelial Tissue

Covers organs and body surfaces, lines cavities and hollow organs, and composes glands.

Connective Tissue

Most abundant tissue type, usually characterized by a large amount of extracellular matrix.

Muscle Tissue

Tissue responsible for movement, which includes skeletal, cardiac, and smooth muscle.

Nervous Tissue

Tissue that makes up the brain, spinal cord, and nerves; responsible for transmitting impulses.

Intercellular Junctions

Structures that facilitate communication and attachment between cells; include tight junctions, desmosomes, and gap junctions.

Simple Squamous Epithelium

A single layer of flat cells, found in areas for diffusion and filtration, such as alveoli.

Simple Cuboidal Epithelium

A single layer of cube-shaped cells, mainly involved in secretion and absorption, found in kidney tubules.

Stratified Squamous Epithelium

Multiple layers of cells; outermost cells are squamous, providing protection in areas like the oral cavity.

Glandular Epithelium

Composed of cells that produce and secrete substances; includes endocrine and exocrine glands.

Collagen Fibers

Thick, strong fibers that provide tensile strength in connective tissues.

Elastic Fibers

Fibers that can stretch and return to original shape; found in structures like lungs and blood vessels.

Fibroblasts

The most common fixed cell in connective tissue, responsible for producing fibers.

Chondrocytes

Cartilage cells that occupy lacunae and do not divide frequently.

Haversian Canal

Central canal in compact bone that contains blood vessels and nerves.

Osteocytes

Bone cells located in lacunae that maintain the bone matrix.

Adipose Tissue

Connective tissue specialized for fat storage, cushions organs, and insulates the body.

Merocrine Glands

Glands that secrete fluid products by exocytosis without losing cellular material.

Holocrine Glands

Glands that secrete by the disintegration of the entire cell.

Epithelial Cell Shapes

Cells can be classified as squamous (flat), cuboidal (cube), or columnar (tall).

Transitional Epithelium

Specialized epithelium that can change shape; found in the urinary bladder.

Loose Connective Tissue

Instantiates an array of connective tissue types, primarily associated with binding and support.

Reticular Connective tissue

A type of loose connective tissue composed of a network of reticular fibers that supports the organs, particularly in lymphatic and hematopoietic tissues.

Dense Regular connective tissue

A type of connective tissue characterized by closely packed bundles of collagen fibers aligned in a parallel pattern, providing tensile strength and support, commonly found in tendons and ligaments.

Dense Irregular Connective tissue

A type of connective tissue that contains collagen fibers arranged in a non-parallel manner, allowing it to withstand tension in multiple directions, found in areas such as the dermis of the skin.

Elastic Connective tissue

A type of connective tissue rich in elastic fibers, allowing it to stretch and recoil, commonly found in large arteries, lungs, and certain ligaments.