Protein - growth and repair of muscles
Calcium - stronger teeth and bones
Iron - helps transport oxygen round the body
Water - regulates body temp and keeps blood the right thickness
Answer:
The biconcave shape allows RBCs to bend and flow smoothly through the body's capillaries. It also facilitates oxygen transport. Red blood cells are considered cells, but they lack a nucleus, DNA, and organelles like the endoplasmic reticulum or mitochondria.
Explanation:
Answer:
In general, pressure-treated lumber is recommended in situations where there is direct contact between the wood and anything that could supply moisture: Retaining walls, which function to support landscaping projects and hold back soil. Any posts or beams that come in contact with the ground or are buried underground.
Explanation:
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Answer: extra wide sidewalks that accommodate wheelchairs
The answer is 6 because the square root of 639246 is 56