Red platelets are too vast to leave any capillaries. As capillaries are just a single cell thick and have thin porous dividers this implies substances can diffuse out of them effortlessly. Helpful substances, for example, oxygen and sustenance diffuse out of the blood in the vessels into the tissue liquid where it is then taken to the cells.
Answer:
Optic chiasma
Explanation:
Optic chiasma is the part of the brain where the optic nerves partially cross.
For example, the optic nerve fibres on the nasal sides of each retina cross over to the opposite side of the brain at the site of optic chiasm. The same thing is with the opposite site. Since the fibres intersect at the chiasm, it has the hallmark X-shape.
Rough endoplasmic reticulum or RER for short.
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Answer:
About 540 to 490 million years ago
Explanation:
The Cambrian is the first and oldest division of the Paleozoic era on the geologic time scale. The other periods in the Paleozoic are the ordovician, silurian, devonian, carboniferous and permian. At the permian a mass extinction occured.
The cambrian is marked with the evolution of lot of life and it is typified by the presence and dominance of trilobites.
