quiz two

What is connective tissue?

the most diverse tissue characterized by having few cells surrounded by extracellular matrix.

What are the two main components of the extracellular matrix?

protein fibers and ground substance.

What are the possible states of the extracellular matrix?

solid, semisolid, gelatinous, or fluid.

What are reticular fibers?

very fine and arranged into a branching framework in soft tissues.

What is the function of collagen fibers?

strong, have a rope-like structure, and can withstand pulling forces.

What are elastic fibers?

they have the ability to stretch and return to their original shape.

What is the role of fibroblasts?

responsible for producing the extracellular matrix.

What are chondrocytes?

cartilage cells found in spaces called lacunae.

What are adipocytes?

specialized cells for the storage of lipid molecules.

What are osteons?

structures found in dense bone that have a significant amount of matrix with tiny pores.

What is the central canal in osteons?

found in the center of an osteon and contains blood vessels and nerves.

What are osteocytes?

the cells found within lacunae in bones.

What are leukocytes?

white blood cells.

What are erythrocytes?

red blood cells.

What is the perikaryon?

a basic component in a neuron, containing typical organelles, including the nucleus.

What is the epidermis?

the thinner superficial layer of skin composed of keratinized, stratified squamous epithelium.

What is the dermis?

the thicker, deeper layer of skin composed of connective tissue.

What is areolar connective tissue?

loose, irregular connective tissue that acts as a general space-filling tissue in the body, with fibers running in all directions. Location: Between muscles.

What characterizes reticular connective tissue?

characterized by a 3-D interlocking network of reticular fibers that form a stroma for support in tissues. Location: Kidney.

What are adipose connective tissue characteristics?

consists of modified connective cells known as adipocytes, which appear empty. Location: Surrounding the eyeball.

What is dense regular connective tissue?

consists of densely packed collagen fibers oriented in the same direction, with scattered fibroblasts between fibers. Location: Tendons.

What is dense irregular connective tissue?

consists of densely packed collagen fibers arranged irregularly, with scattered fibroblasts between fibers. Location: Dermis.

What is hyaline cartilage?

has a dense network of collagen fibers in a gel-like matrix, with collagen fibers not visible in the matrix. Location: Larynx.

What is elastic cartilage?

very resilient and flexible due to elastic fibers. Location: Epiglottis.

What is fibrocartilage?

characterized by numerous bundles of collagen fibers within the matrix, providing great tensile strength to tissue. Location: Pubic symphysis.

What is dense bone connective tissue?

has osteons with a central canal, lacunae, and osteocytes within lacunae. Location: Bones of the skeleton.

What is blood connective tissue?

a liquid connective tissue with a stud matrix called plasma. Platelets are the smallest fragments. Location: Within blood vessels.

What is nervous tissue?

consists of perikaryon (cell body) with extending axons and dendrites. Location: Nervous system.

What makes up the integumentary system?

comprises the skin and various accessory structures. The epidermis, dermis, and hypodermis are all part of the skin. The hypodermis is comprised of adipose and connective tissue.

What are the layers of the epidermis from top to bottom?

stratum corneum, Stratum lucidum, Stratum granulosum, Stratum spinosum, Stratum basale.