Choose the main idea of this paragraph,
red blood cells are specialized cells. their disk shape allows them to move through
very small veins and arteries. hemoglobin is a compound that transport both
oxygen and carbon dioxide. it also allows red blood cells to carry oxygen to your cells
and take waste away.
their disk shape allows them to move through very small veins and arteries.
hemoglobin is a compound that transport both oxygen and carbon
dioxide
red blood cells are specialized cells.
question 2 (2 points)

The main idea of this paragraph is that red blood cells are specialized cells. So Option C is the correct one.

Explanation:

Red blood cells are disk-shaped which can move through very small veins and arteries. It contains a protein molecule - Haemoglobin that helps to transport both oxygen to your cells and take away carbon dioxide and waste away from the cells as well. Having a normal level of these cells is important.

Lesser levels mean anaemia and other complications. A higher level may also be a sign of a health problem so having a normal level of RBCs is necessary. Since, they perform some very important functions that’s why they can be called specialized cells.  

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