Circulatory, Respiratory, and Digestive Systems Flashcards
What is the function of the Circulatory System?
transport nutrients and oxygen to cells
What do the arteries do?
carry blood AWAY from the heart
What do the capillaries do?
substances are exchanged between blood and body
What do veins do?
carry blood BACK to the heart
What colors does blood change when circulating through the body?
O2 rich: bright red
O2 poor: dark red
What is plasma?
It is made of mostly water
What are white blood cells part of?
the immune system
what do plantlets do?
helps blood clots form
what do red blood cells do?
carry oxygen
What does the aorta do?
pumps blood to all of the body
What is the function of the respiratory system?
supply oxygen (o2)
remove carbon dioxide (co2 waste product)
Where does the gas exchange happen?
between the alveoli and the capillaries
What happens in the nose?
inhaled air is cleaned, warmed, and moistened
What is the pharynx?
a passage for both food and air
what is the epiglottis?
flap closing over larynx to keep food + water out
what is the larynx
the voice box
what is the trachea?
the windpipe
what is the diaphragm?
contracts + relaxes to intake o2 and release co2
What is the function of the digestive system?
break down food to extract nutrients for cell use
What is mechanical digestion?
physical change
-food physically broken down
What is chemical digestion?
chemical change
-always cause a chemical change!
-new substance
Where does digestion begin?
in the mouth
-saliva chemically digests food w/ enzymes
what is peristalsis?
food being pushed down to the stomach by muscular contractions
What is the mechanical digestion in the stomach?
- stomach muscles churn food
- food is mixed and broken up
