TISSUES Flashcards
ADIPOSE TISSUE
areolar connective tissue modified to store nutrients: a chief of fatty cells
ANAPHASE
3rd stage of mitosis: daughter chromosomes move toward pole of cell
ARRECTOR PILI
tiny, smooth muscles attached to hair follicles; makes hair stand upright
ATP (adenosine triphosphate)
organic molecule that stores and releases chemical energy for use in body cells
CENTRIOLE
minute body found near the nucleus of the cell: active in cell division
CELLS
basic structural and functional unit of living organisms
CHROMOSOME
barlike bodies of tightly coiled chromatin; visible during cell division
CILIA
tiny, hairlike projections on cell surfaces that move in a wavelike manner
COLLAGEN FIBERS
most abundant of 3 fibers found in matrix of connective tissue
CONNECTIVE TISSUE
primary tissue: form, function extensively; functions: support, storage, and protection
CYTOKINESIS
division of cytoplasm; occurs after cell nucleus has divided
CYTOSOL
viscous, semitransparent fluid of cytoplasm, other elements are suspended
DERMIS
layers of skin deep in epidermis; irregular connective tissue
DIFFUSION
spreading of particles; kinetic energy
DNA
nucleic acid found in all living cells; hereditary info.
DNA REPLICATION
process that occurs before cell division; all daughter cells are identical
ECCRINE GLANDS
sweat glands on the palms, soles of feet, and forehead
ELASTIC FIBERS
fiber formed from protein elastin, gives a rubbery resilient quality to connective tissue
ENDOCRINE GLANDS
ductless glands that empty hormonal products into blood
ENDOPLASMIC RETICULUM (ER)
membranous network of tubular or saclike channels in the cytoplasm cell
ENDOTHELIUM
single layer of squamous cells; lines the walls of the heart, blood vessels, lympathic vessels
EPIDERMIS
superficial layer of skin; composed of keratinized stratified squamous epithelium
EXOCRINE GLANDS
glands that have ducts; secretions are carried to a particular site
EXOCYTOSIS
substances are moved from cell interior to extracellular space
HAIR FOLLICLES
outer and inner root sheaths extends from epidermal surface into dermis; new hair develops
HYPERTONIC SOLUTIONS
high concentration; greater osmotic pressure than reference solution (blood plasma)
HYPODERMIS
subcutaneous tissue just deep to the skin; has adipose tissue and connective tissue
HYPOTONIC SOLUTIONS
solution that is more dilute than reference cell ( fewer nonpenetrating solutes)
KERATIN
protein found in epidermis, hair, and nails, makes it hard and water resistant
LYSOSOMES
organelles in golgi apparatus, contain strong digestive enzymes
MAMMARY GLANDS
milk-producing glands of the breast
MEIOSES
nuclear division process, reduces chromosomal # by half forms 4 haploid cells, certain reproductive organs
METAPHASE
2nd stage of mitosis
MICROTUBULES
hollow tubes made of spherical protein determines cell shape also cellular organelles
MICROVILLI
tiny projections on some epithelial cells; increase area of absorption
MITOCHONDRIA
cytoplasmic organelles responsible for ATP; cellular activities
MITOSIS
chromosomes are redistributed to 2 daughter nuclei
MUCOUSE MEMBRANE
forms the linings of body cavities open to the exterior ( digestive, respiratory, urinary, and reproductive tracts)
NUCLEOLI
dense spherical bodies in cell nucleus involved with RNA
ORGANS
part of the body formed of 2 or more tissues, carries out specific functions; stomach
OSMOSIS
diffusion of a solvent through a membrane from a dilute solution to a more concentrated one
PHAGOCYTOSIS
engulfing of foreign solids by (phagocytic) cells
PROPHASE
1st stage of mitosis
RIBOSOMES
cytoplasmic organelles; proteins are synthesized
RNA
nucleic acid contains ribose and bases A,G,C,U; DNA’s instructions for protein synthesis
SEBACEOUS GLANDS
epidermal glands produce oily secretion called sebum
SEROUS MEMBRANE (SEROSA)
moist membrane found in closed ventral body cavities
SUDORIFEROUS GLANDS
epidermal gland that produces sweat
TELOPHASE
final stage of mitosis; begins with migration of chromosomes, completes and ends with 2 daughter nuclei
TISSUES
similar cells and intercellular substance, performs specific functions