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A&P lab2

QuestionAnswer
connective tissue connective tissue proper, cartilage, bone, blood
fibroblasts secretes matrix
matrix ground substance + fibers
ground substance liquid, semisolid, gel-like or very hard
fibers provide support
collagen fibers white
elastic fibers yellow
reticular fibers fine collagen
areolar loose CT fx wraps & cushions organs, macrophages, inflammation, holds fluid
areolar loose CT loc under epithelium, packages organs, surrounds capillaries
adipose loose CT fx reserve fuel, insulates, protects
adipose loose CT loc under skin, around kidneys & eyeballs, abdomen, breasts
reticular loose CT fx forms stroma, supports immune cell types
reticular loose CT loc lymphoid organs
dense regular CT fx attaches muscles to bones or muscles, withstand strength in one direction
dense regular CT loc tendons, most ligaments, aponeuroses
dense irregular CT fx tension in many directions, strength
dense irregular CT loc fibrous capsules of organs & joints, dermis, submucosa of digestive tract
dense elastic CT loc aorta
chondrocytes produce matrix when mature
lacunae holds chondrocytes
hyaline cartilage fx supports & reinforces cushioning, resists compressive stress
hyaline cartilage loc embryonic skeleton, ends of long bones, costal cartilage, nose, trachea, larynx
elastic cartilage fx maintains structure while maintaining flexibility
elastic cartilage loc external ear (pinna), epiglottis
fibrocartilage fx tensile strength & absorb compressive shock
fibrocartilage loc intervertebral discs, pubic symphysis, discs of knee joint
osteocytes bone cells lie in lacunae
integumentary system protection, insulation, cushioning, waterproofing, regulates heat loss, extretion, synthesis of Vitamin D, sensory organs
keratinocytes most abundant of epidermal cells - make keratin
keratin fibrous protein that gives epidermis its durability and protective capabilities
melanocytes spidery black cells that produce melanin
melanin provides a protective pigment umbrella over the nuclei of keratinocytes to shield from DNA damage
laters of epidermis stratum basale, stratum spinosum, stratum granulosum, stratum lucidum, stratum corneum
stratum basale deepest layer, mitosis
stratum spinosum look spiky
stratum granulosum lamellated granules & keratohyaline granules
stratum lucidum translucent band, only in thick skin
stratum corneum 20-30 cell layers, dead cells
dermis pipillary & reticular regions
papillary layer more superficial, made up of areolar CT
dermal papillae fingerlike projections of papillary layer
reticular layer deepest skin layer, dense irregular CT, contains arteries, veins, sweat & sebaceous glands, Pacinian corpuscles
hypodermis adipose tissue layer under dermis
arrector pili goosebumps
sebaceous glands oil glands, produces sebum
sebum oily substance that lubricates
sudoriferous glands sweat glands, all over body, outlets at pores
eccrine glands all over, produce perspiration (H2O, salts, urea), regulates heat
apocrine glands axillary & genital areas (milky protein & fat plus rich substance)
Meissner's Corpuscle touch receptors in papillary layer
Pacinian Corpuscle deep pressure receptors in reticular layer
Created by: launawe