Answer:
Their upper extremities are on a level with the upper border of the twelfth thoracic vertebra, their lower extremities on a level with the third lumbar. The right kidney is usually slightly lower than the left, probably on account of the vicinity of the liver.
Answer:
The correct answer is C.
Explanation:
Blood enters the heart through the superior vena cava and the inferior vena cava into the right atrium. When the right atrium contracts, this poor oxygen blood flows to the right ventricle through the tricuspid valve. The valve then closes and the right ventricle contracts ejecting blood through the pulmonary trunk and pulmonary arteries to the lungs to be oxygenated.
Pulmonary veins carry oxygen-rich blood from the lungs into the left atrium. Then the atrium contracts and blood flows from your left atrium into your left ventricle through the mitral valve. The valve then closes, the left ventricle contracts and blood leaves the heart through the aortic valve, into the aorta and to the body.
Answer:
B
Explanation:
trivially easy to copy and redistribute
Answer:
See explanation and image attached
Explanation:
The structure of imidazole is attached to this answer. The compound is colourless. The solid can be to dissolved in water leading an alkaline solution. Owing to the fact that imidazole possesses heteroatoms in an aromatic heterocycle it is classified as a diazole. The nitrogen atoms in imidazole are not adjacent to each other.
From the structure shown, we can see that the lone pair of the sp2 hybridized nitrogen atom is available because it is not part of the aromatic system of the heterocycle. This nitrogen is much more basic than the nitrogen atom attached to hydrogen whose lone pair becomes part of the aromatic sextet hence it unavailable for protonation and less basic.
Answer:
The heart is a muscle and therefore it can be stimulated by electrical impulses.
Explanation:
In the heart, the electrical activity is generated in the SA node and conducted from the right atrium to the left atrium in order to contract myocardial cells
