Groups of cells that are similar in structure and perform a common or related function form a(n).

A. bone; adipose:Bone is the most solid connective tissue, providing structural support and protection. Adipose tissue, while soft and pliable, is not the most fluid connective tissue since it primarily stores fat rather than circulating or transporting substances.

B. bone; blood:Bone is the densest and most rigid connective tissue, providing support, protection, and leverage for movement. Blood is the most fluid connective tissue, circulating throughout the body to transport nutrients, gases, hormones, and waste products.

C. hyaline cartilage; areolar:Hyaline cartilage is firm but not as rigid as bone, and areolar connective tissue is loose and supportive but not fluid; it serves as a cushioning and binding tissue rather than a circulating medium.

D. fibrocartilage; areolar:Fibrocartilage is tough and less compressible than hyaline cartilage but is still less solid and rigid than bone. Areolartissue is a viscous, gel-like matrix that is not the most fluid type.

A. Melanocytes:Melanocytes are specialized cells that produce melanin to protect against UV radiation. They do not function as sensory receptors and are not involved in touch sensation.

B. Keratinocytes:Keratinocytes form the majority of the epidermis and provide a protective barrier. While they interact with other skin cells, they do not detect sensory stimuli.

C. Adipocytes:Adipocytes are fat cells located in the subcutaneous layer. They serve as energy storage and insulation but are not involved in sensing touch.

D. Dendritic cells:Dendritic cells are immune cells in the skin that detect pathogens and present antigens. They play a role in immune defense rather than tactile sensation.

E. Tactile cells:Tactile cells, also known as Merkel cells, are specialized mechanoreceptors located in the basal layer of the epidermis. They detect light touch and pressure, transmitting sensory information to sensory neurons.