Lab 3 Connective Tissue Flashcards
ground substance
noncellular material produced by the connective tissue. forms w/ protein fibers to form extracellular matrix
protein fibers
found outside the cell. may provide strength and stretch for a tissue. forms w ground substance to form extracellular matrix. collagen, elastic, and reticular fibers
collagen fibers
very strong unbranched “ropelike” proteins that provide strength and flexibility to tissue
elastic fibers
composed of protein elastin, provide stretch to tissue
reticular fibers
thin branched fibers similar to collagen. provide tough and flexible scaffold
areolar connective tissue
scattered fibroblasts within an abundant viscous ground substance, few elastic and collagen fibers, many blood vessels
protects tissues, binds skin and epithelia to deeper tissue; provides space for blood vessels and nerves
papillary layer of dermis, subcutaneous later, surrounds organs, some muscle cells, and component of blood vessel walls
adipose connective tissue
closely packed adipocytes, nucleus pushed to edge of cell by large fat droplet, contains many blood vessels
stores energy; insulates, cushions, and protects
subcutaneous later, surrounds and covers some organs
reticular connective tissue
some fibroblasts and numerous leukocytes within a viscous ground substance, meshwork of reticular fibers
provides stroma (supportive framework) to lymphatic organs
spleen, lymph nodes, red bone marrows
dense regular connective tissue
fibroblasts squeezed between densely packed parallel arrays of collagen fiber, scarce ground substance, limited blood vessels
attaches bone to bone, as well as muscle to bone, resists stress applied in one direction
tendons, ligaments
dense irregular connective tissue
fibroblasts between densely packed but randomly arranged and clumped collagen fibers, more ground substance than in dense regular connective tissue, extensive blood vessels
withstands stress applied in all directions, durable
reticular layer of the dermis, epimysium covering skeletal muscle, epineurium covering nerves, periosteum covering bone, perichondrium covering cartilage, some organ capsules
elastic connective tissue
limited fibroblasts between densely packed elastic fibers
allows for stretching and recoil
walls of elastic arteries, trachea, vocal cords
hyaline cartilage
irregularly arranged chondrocytes in lacunae, glassy appearing ground substance, collagen fibers not visible
provides support, form most fetal skeleton
tip of nose, trachea, bronchi, most of larynx, costal cartilage, both the epiphyseal plates and articular ends of long bones
fibrocartilage
large chondrocytes in lacunae, numerous parallel collagen fibers, limited ground substance
weight bearing cartilage that resists compression, acts as a shock absorber in some joints
intervertebral discs, pubic symphysis, menisci of knee joints
elastic cartilage
closely packed chondrocytes in lacunae, abundant elastic fibers that form weblike mesh, limited ground substance
maintains shape while permitting extensive flexibility
external ear, epiglottis of larynx
compact bone tissue
osteocytes within lacunae entrapped in calcified extracellular matrix, compact bone organized in osteons, spongy bone is a meshwork that has a different organization from compact bone, both types well vascularized
provides levers for body movement, supports soft structure, protects organs, stores calcium and phosphorus, spongy bone contains hematopoietic tissue
bones of the body
