Healthy skin cells require a constant supply of blood. in decubitus ulcers, or bed sores, this blood supply is hindered because superficial blood vessels are compressed. which layer(s) of the skin hold(s) such compressed blood vessels?

the papillary and reticular layers pf the dermis.

Hope This Helps!

Reticular and papillary layer of dermis.

Explanation:

The blood is the main connective tissue present in the body. Each and every cell of the body requires blood for its activation and blood supplied cells remain healthy.

The bed sores hinders the blood supply because the superficial blood vessels are restricted. The papillary layer of the dermis and the reticular layer of the skin holds the compressed blood vessels in the case of the decubitus ulcers.

Thus, the answer is reticular and papillary layer of dermis.

the answer to your question is tooth decay.

answer and explanation;

volcanic rocks are igneous rocks which form from lava, molten rock which has been thrust out of a volcano onto the surface of a rocky body such as an asteroid, planet, or dwarf planet.  

plutonic rocks are igneous rocks which form from subterranean chambers of molten rock or magma. plutonic rocks make up the base of continental crust as well as oceanic crust. their slow rate of formation causes them to be coarse grained since there is plenty of time for large crystals to form before the magma solidifies into rock.

the textural difference is that plutonic rocks are more coarse grained than volcanic rocks. plutonic rocks are coarse grained while volcanic are fine grained ; glassey or fragmental. since fine and coarse are adjectives the decision as to whether a rock is fine or coarse grained is generally made on the bases of whether or not the individual crystals can be seen in most if the rock.