water is always
main molecule in cell membranes
cell boundary made of 2 layers of lipid cells surrounds cell as membrane structure
when you go from high to low
diffuse across cell membrane
water and small lipids can...
when a cell membrane only lets some molecules into the cell
bubbles around certain substances that move things in and out of the cells in endo/exocytosis
pumping blood to lungs
pumping blood to body
blood vessel brings blood away from the heart, most muscular
blood vessel brings blood towards the heart
keep blood from flowing backwards into atria
smallest blood vessel, brings nutrients and oxygen to tissues, absorbs carbon dioxide and waste products, in the kidney: reabsorb needed nutrients and secret waste materials
upper muscular chamber of the heart, receives and holds blood that is about to enter the ventricle
pumps oxygenated blood to aorta, and deoxygenated blood to pulmonary arteries to go to lungs (more muscular than atria)
straw colored fluid, makes up 55% of blood, made of water, nutrients, enzymes, hormones, and proteins
protein in red blood cells that transports oxygen from lungs to body tissues
red blood cells
blood cell that contains protein hemoglobin which transports oxygen
white blood cells
blood cell that fights off foreign substances in the body
cell fragment released by bone marrow that helps blood clot
to exchange oxygen and carbon dioxide
windpipe, tube which air moves through
also called the vocal cords, 2 elastic folds of tissue when pull the air going between them make vibrations that create sounds
tiny air sacs that are connected to the end of bronchioles that provide surface area for gas exchange
air chambers that take in and push out air with the diaphragm that contain bronchioles
muscle under the lungs, when it contracts down air goes in and pushes air out when it contracts up
2 large chest cavities that air pass through before the bronchioles
to transport oxygen and glucose throughout the body
main organ in excretory system
tubes in the kidney that filter the blood
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