The right answer is The pressure in veins is lower than in arteries, causing less seepage of blood.
The arteries are the vessels located at the exit of the heart towards the organs. When the heart contracts like a pump to expel the blood to the arteries, the pressure is very strong. This is called systolic pressure. To cope with this pressure, the arteries have a thick and elastic wall, to be able to stretch without breaking. The arteries have an average diameter of 2.5 centimeters, against less than 2 mm for arterioles.
Unlike the arteries, the veins are subjected to a weak pressure, since the blood starts from the organs and not from the heart. The walls of the veins are therefore thin and fairly rigid because they have little resistance to provide against the pressure. The diameter of the veins and venules is rather small (smaller than arteries) and hardly varies. Veins and venules contain about 75% of the blood. During a cut, the blood of the veins gradually trickles.
So from these explanations, we can conclude that the propositions B; C and D are false, it is rather their opposite that is right.
Answer:
As there is no natural gaseous form of phosphorus, it has no atmospheric component in its global biogeochemical cycle. ... However, a phosphorus deposition study performed in South Florida found that wet and dry deposition are two independent processes with low correlation
Explanation:
The short segment is know as a GENE.
A gene is a coding region in a DNA that has functional amino acids which code for a particular trait in the living organism. The instructions in the coding region enable the cells to produce a specific functional protein.
Answer:
sound waves. they come in longitudinal waves and vibrations. echo is wrong though youre right on that one
Answer:
elliptical (nearly circular)
Explanation:
According to Kepler's laws of planetary motion, the planets do not revolve around the Sun in exact circular orbits. The path of the planet or any other body in the solar system is elliptical, with the Sun at one of the foci. Though, the eccentricity is not large, so one can say, the path of the planets and the asteroids around the Sun is nearly circular.