Your answer would be C.It encloses the cytoplasm.
Answer:
All the arteries except pulmonary artery carry pure blood..it is so because blood flows with a high pressure and speed And because Arteries are situated deeper under the skin have thick-walled with Narrow lumen(cavity) and pulmonary artery carries deoxygenated blood i.e without oxygen..
Explanation:
lumen means Empty space within an object(solid)
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Answer:
The process autotrophs (plants) use to create food. they convert CO2 (Carbon Dioxide) and H2O (Water) into O2 (Oxygen) and glucose (sugar).
