I’m not sure but I think it’s the sebaceous glands
If you were to cross a large redwood tree, like for an example a sequoia, from the middle of the trunk you would first cross the annual rings, indicators of the trunk growth over the years, then after that you would cross the phloem, the ''piping'' of the tree responsible for the transport of water throughout the tree and in the end you would cross the tree's bark, the protective layer on surface of the trunk.
The coronary artery supplies blood to the heart. if there are blockages, you will have a heart attack, since this artery supplies oxygen rich blood to the heart. Without it, the heart can die
Answer: . Estuaries rank high on the list of the most heavily impacted aquatic systems on earth. This is largely attributed to accelerating population growth and development in the coastal zone and escalating use of estuarine resources.
not 100% sure