How does the structure of the small intestine it to perform its function?
a
bile from the liver is secreted into the small intestine to make the absorption of nutrients more efficient.
b
involuntary muscles of the small intestine contract to make the absorption of nutrients more efficient.
c
salivary glands deposit saliva into the small intestine to make the absorption of nutrients more efficient.
d
villi in the small intestine have thin-walled capillaries to make the absorption of nutrients more efficient.

When does a spring tide occur? question 9 options: they occur when the sun, moon, and earth are aligned. in spite of their name, these tides occur twice a year in the spring and fall. they occur on the date of the vernal equinox each year, no matter what stage the moon is in. this is why they are called spring tides. they occur when the sun, moon, and earth are at 45-degree angles from each other. this happens once every spring. they occur when the sun, moon, and earth are aligned. in spite of their name, these tides occur all year long.