Answer:
The pulmonary vein and the jugular vein.
Explanation:
The greatest difference between the pulmonary vein and the jugular vein is that pulmonary vein takes oxygenated blood from both lungs towards the left atrium of heart while jugular vein takes the deoxygenated blood from head back towards right atrium of heart through superior vena cava.
So, the main difference is oxygenated and deoxygenated blood in the above mentioned veins.
Intermediate and deep focus earthquakes. The reason is being the tectonics plates are always shifting and so, old it’s always able to cause a problem. The tectonic plates crash at some point. Usually it’s a small one at first, then a big one, and after that a aftershock which is bigger than the second one.
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Correct answer: B). They can be transformed into any type of body cell.
The stem cell is the biological cell that has the ability to differentiate into other types of cell. These are always found in the multi-cellular organism. These cells are known to be the foundation of every tissue and organ in our body. Embryonic stem cell is pluripotent, it means they can give rise to every type of cell in the body.
Example: Hematopoietic stem cells that give rise to all type of blood cells like red blood cells, white blood cells etc.
Hence, the correct answer would be option B.
Answer:
d. The person's blood vessels in the dermis have undergone
Explanation:
Humans are warm-blooded animals and maintain constant body temperature by using the energy produced during metabolism. To maintain constant body temperature, several thermoregulatory mechanisms operate. Skin is also involved in thermoregulation.
The thermoreceptors present in the skin layers sense the drop in the temperature of surroundings and the blood capillaries present in the dermis are narrowed. Constriction of blood vessels of the dermis occurs to reduce the blood supply to the skin and thereby prevent the heat loss from the body. Vasoconstriction of blood capillaries of the dermis and the resultant reduced blood flow impart pale appearance to the light-skinned person in winters.