absorption of materials
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name the three small soluble products produced during digestion reactions
starch > amylase > glucose protein > protease > amino acids fat > lipase > fatty acids and glycerol
where are nutrients (glucose and amino acids) from food absorbed?
villi in the small intestine
where are fatty acids and glycerol absorbed ?
the lacteal
which factors increase the efficiency of absorption?
large surface area thin walls extensive blood supply
what is the body’s organ of gas exchange?
the lungs
when we breathe in air, where does it go?
down the trachea (windpipe) it then branches off into the left and right bronchus which further branches into the bronchioles.
how are the windpipe and bronchus supported?
rings of cartilage
where is gas exchanged with the blood in the lungs?
the alveoli (air sacs) consist of a large number of alveoli providing a large surface area. Oxygen and carbon dioxide are absorbed through the thin alveolar walls to or from the many blood capillaries