unit 3 reading 20

Question 1

alveoli

Answer 1

any of the tiny air-filled sacs of a mammalian lung

Question 2

blood vessels

Answer 2

A tube through which the blood circulates in the body

Question 3

capillaries

Answer 3

in a closed circulatory system
any of the small tin-walled blood vessels that permeate all tissues and organs and allow exchange of gases and other molecules between blood and body cells

Question 4

circulation

Answer 4

the flow of blood through the heart and blood vessels, and the flow of lymph through the lymph vessels.

Question 5

circulatory system

Answer 5

system responsible for moving oxygen, carbondioxide, hormones, nutrients, wastes, and other materials w/i the animal body

Question 6

closed circulatory system

Answer 6

circulatory system in which the circulating fluid (blood) is confined to blood vessels and flows ina continuous circuit

Question 7

heart

Answer 7

muscular pump that circulates blood or hemolymph throughout an animal

Question 8

hemoglobin

Answer 8

oxygen-binding protein consisting of four polypeptide subunits (each containing an oxygen-binding heme group)
-the major oxygen carrier in mammalian blood

Question 9

heme

Answer 9

small molecule that binds to each of the four polypeptides in hemoglobin
-contains an iron ion that can bind oxygen

Question 10

lungs

Answer 10

any respiratory organ used for gas exchange b/w blood or hemolymph and air

Question 11

open circulatory system

Answer 11

circulatory system in which the circulating fluid (hemolymph) is not confinded to blood vessels

Question 12

partial pressure

Answer 12

pressure of one particular gas in a mixture of gases (contribution of that gas to the overall pressure)

Question 13

pulmonary circuit

Answer 13

part of the circulatory system that carries oxygen-poor blood from the heart to the lungs and returns oxygen-rich blood to the heart
(seperate from the res of the circ sys)

Question 14

respiratory system

Answer 14

collection of cells tissues and organs responsible for gas exchange b/w an animal and its environment

Question 15

red blood cells

Answer 15

hemoglobin-containing cell that circulates in the blood and delivers oxygen from the lungs to the tissues

Question 16

systemic circuit

Answer 16

part of the circulatory system that carries oxygen-rich blood from the heart ot the rest of the body and returns the oxygen-poor blood to the heart (seperate from the pulmonary circuit)

Question 17

ventilation

Answer 17

Breathing is the process of moving air into and from the lungs to facilitate gas exchange with the internal environment, mostly to flush out carbon dioxide and bring in oxygen