Basic Tissues and Body Organization

A type of connective tissue featuring abundant ground substance, a network of collagen and elastic fibers (though fewer than dense tissue), and various cells like fibroblasts, adipocytes, and macrophages. This allows for flexibility and provides support and nourishment to surrounding tissues.

Characterized by densely packed collagen fibers arranged haphazardly, little ground substance, and mainly fibroblasts. Its haphazard organization allows it to resist tension from multiple directions.

A type of connective tissue with densely packed collagen fibers arranged in parallel bundles, little ground substance, and mainly fibroblasts. This structure provides great strength in a single direction.

A specialized tissue responsible for generating movement through contraction. There are three main types: skeletal, smooth, and cardiac.

Muscle tissue that is attached to bones, moves and stabilizes the skeleton, and also forms sphincters in certain organs like the digestive tract. It is responsible for voluntary movement.

Specialized areas of cell membrane that bind one cell to another.

Very strong connections between adjacent cells that resist stretching and twisting.

Interlocking proteins that tightly bind cells together near the apical edge, preventing the passage of water and solutes between cells.

Cells held together by interlocking membrane proteins containing a central pore. Allows the movement of small molecules and ions between cells.

Attach cells to the basement membrane, stabilizing their position and anchoring them to the underlying tissue.

Forms a structural framework for the body, supporting, surrounding, and interconnecting other tissue types. It also protects delicate organs, transports fluids, stores energy, and defends the body from microorganisms.

Consists of cells within an extracellular matrix, which is made up of ground substance, tissue fluid, and fibers.

The main cell type that synthesizes the extracellular matrix.

Connective tissue proper is classified based on the type, arrangement, and abundance of fibers, cells, and ground substance.

Specialized connective tissue includes blood, bone, and cartilage, each with unique properties and functions.

A layer of cells that covers surfaces, lines cavities and tubes, and forms glands. It is characterized by its attachment to a basement membrane, lack of blood vessels, regeneration ability, and clear polarity with an apical and basal surface.

The classification of epithelia is based on the number of cell layers and the shape of cells in the most superficial layer.

Epithelia with a single layer of flat cells, often involved in exchange of nutrients and gases.

Epithelia with multiple layers of flattened cells, containing keratin for protection and water resistance.

Epithelia with multiple layers of flattened cells, lacking keratin, primarily for protection.

A single layer of cube shaped cells with round nuclei, involved in secretion and absorption.

A single layer of tall, rectangular cells, with nuclei at the base, involved in absorption and secretion. Often have microvilli on their apical surface to increase surface area.

Appears stratified, but all cells are attached to the basement membrane. Contains goblet cells that secrete mucus and cilia that move substances.

A type of connective tissue that provides support, protection, and insulation. It is composed of various cells embedded in a matrix of fibers.