Ch 16. Tissues, Organs, and Organ Systems Flashcards Preview

Human Biology > Ch 16. Tissues, Organs, and Organ Systems > Flashcards

Flashcards in Ch 16. Tissues, Organs, and Organ Systems Deck (17):
1

tissue

group of similar cell types that perform a common function

2

epithelial tissue

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

3

connective tissue

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.

4

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

5

wrinkles

degradation of elastin and collagen

6

adipose tissue

connects skin to underlying structures, insulates, and protects organs. synthesize and store energy-rich reserves of fat/lipids. cells are cheif structure

7

blood

cells suspended in liquid and protein rich matrix called plasma

8

fibrous connective tissue

tendons and ligaments. cells are fibroblasts. densely packed collagen fibers arrange in parallel

9

cartilage

cells are chondrocytes that secrete the dense matrix rich in collagen.shock absorption. no vessels, so injuries heal slowly if at all

10

bone

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

11

muscle tissue

capable of contracting. fibers contain actin and myosin protein that cause contraction when signaled.

12

skeletal muscle

voluntary. striated. exercise increases cell size not number

13

muscle striation

actin and myosin bands. smooth still has proteins, just not banded patterns

14

cardiac muscle

involuntary. striated. highly branched and interwoven producing coordinated heartbeat

15

smooth muslce

involuntary. not striated. contracts slower, but can stay contracted longer

16

nervous tissue

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.

17

tissue donation

once removed from donor, tissues are chemically treated to remove any cells/proteins on surface that could cause rejection. after tested and treated, sent frozen to tissue and eye banks. can be stored up to 5 years