Flashcards in Ch 16. Tissues, Organs, and Organ Systems Deck (17):
group of similar cell types that perform a common function
may be single or mutilayered. function in protection, secretion, and absorption. some glands are outgrown epithelial tissue, constantly sloughed off and replaced by cell division. replacement of epidermis every 4-6 weeks
bind organs or tissue together. cells embedded in matrix of protein fibers and amorphous, gel-like substance. proportions vary on location and requirements. consistency is a function of fibers and ground substances present.
loose connective tissue
connects epithelia to underlying tissues, holds organs in place, and acts as padding. loose weave of constituent fibers. cells are fibroblasts that secrete proteins collagen and elastin. matrix is cheif structure
degradation of elastin and collagen
connects skin to underlying structures, insulates, and protects organs. synthesize and store energy-rich reserves of fat/lipids. cells are cheif structure
cells suspended in liquid and protein rich matrix called plasma
fibrous connective tissue
tendons and ligaments. cells are fibroblasts. densely packed collagen fibers arrange in parallel
cells are chondrocytes that secrete the dense matrix rich in collagen.shock absorption. no vessels, so injuries heal slowly if at all
framework of body. marrow inside makes RBCs, cells are osteocytes that secrete substance to harden into solid matrix of collagen and calcium. central canals house nerves and blood vessels
capable of contracting. fibers contain actin and myosin protein that cause contraction when signaled.
voluntary. striated. exercise increases cell size not number
actin and myosin bands. smooth still has proteins, just not banded patterns
involuntary. striated. highly branched and interwoven producing coordinated heartbeat
involuntary. not striated. contracts slower, but can stay contracted longer
neurons conduct and transmitt electrical impulses. main function to sense stimuli, process it, and transmitt signals. do not undergo cell division and cant repair themselves.