It is the Iris I believe. It controls the diameter and size of the pupil, controlling the amount of light reaching the retina.
C the content is current but It might be D
Good coronary circulation nourishes the heart and reduces the risk of a heart attack. Coronary arteries supply blood to the myocardium and other components of the heart. They originate from the left side of the heart at the base of the aorta. The heart muscles needs oxygen-rich blood to be able to carry out its functions.
Answer:
mantle
Explanation:
A mantle is a layer inside a planetary body bounded below by a core and above by a crust. Mantles are made of rock or ices, and are generally the largest and most massive layer of the planetary body. Mantles are characteristic of planetary bodies that have undergone differentiation by density. All terrestrial planets (including Earth), a number of asteroids, and some planetary moons have mantles.
Answer: prokaryotic cells
Explanation:
A prokaryotic cell is a cell without a nucleus. Since this is a simple definition I cannot explain much further, but an example of a prokaryotic cell is bacteria.