Answer:
Each villus, in turn, has thousands of even smaller projections called microvilli (singular: microvillus).
Explanation:
The villi contain capillaries, which are tiny blood vessels. Nutrients are absorbed into these capillaries across the surfaces of the villi and microvilli. Because there are millions of these tiny projections, they greatly increase the surface area for absorption.
Answer:
D. The energy is used by organisms for life functions or is lost as heat.
Explanation:
Answer:
a. vitamin d and vitamin b12
Explanation:
Vitamins are groups of organic compounds that are essential in small quantities for healthy human growth, metabolism, development, and body function. Vitamins are found in plants and animal foods or sometimes produced synthetically. Deficiencies of specific vitamins produce specific disorders. Vitamin d and vitamin b12 are important vitamins that the body needs. The body produces vitamin D when the skin is exposed to sunlight and it is very essential for strong bones, while vitamin b12 is naturally present in meats. Deficiency of vitamin d in the body can result in bone problems (including teeth) and it has also been linked to depression. Vitamin b12 deficiency can also affect mental functions by causing disorientation, memory loss, depression and confusion.
From the question, the elderly woman may be developing a deficiency of vitamin d and vitamin b12.
Answer:
Dalton hypothesized that the law of conservation of mass and the law of definite proportions could be explained using the idea of atoms. He proposed that all matter is made of tiny indivisible particles called atoms, which he imagined as "solid, massy, hard, impenetrable, movable particle(s)"
Explanation:
need thanks